Russia’s renewed infrastructure offensive, as well as preparations for another round of U.S.–Iran escalation are this week’s central developments. Ukraine has evidence of local battlefield success, but its cities face mounting pressure from long-range attacks. In the Gulf, military preparations are advancing while diplomatic exchanges continue without an implemented agreement.

This edition covers September 26 through October 2. It applies the MIL framework to reviewed public reporting. Assessments below are editorial judgments, not outputs from a separately executed or calibrated forecasting model.

What changed this week

• Russia renewed a major attack campaign against Ukraine’s electricity infrastructure on September 30. Ukrainian officials reported emergency power cuts and damage across several regions. Reporting
• Repeated strikes on Kyiv’s Southern Bridge disrupted movement across the Dnipro on October 1 and 2. Closures and restrictions affected multiple crossings, extending the disruption beyond the sites directly struck. Reporting
• The U.S. is sending the USS Theodore Roosevelt carrier group and an additional amphibious force toward the Middle East. The carrier’s eventual relief role means deployment announcements alone don’t establish a lasting increase to three carriers on station. Deployment details
• Reuters reported Iranian preparations for a wider response if large-scale U.S. attacks resume. Its sources described planning, with no final decision made. Reporting

Battlefield and force posture

Ukraine and Russia

On September 30, President Volodymyr Zelenskyy said Operation Vivaldi had recovered 176 square kilometers around Lyman and frustrated Russian efforts to get behind defenses protecting Sloviansk and Kramatorsk. That’s an attributed Ukrainian claim covering the operation’s duration, not territory recovered during this reporting week. Frontline visit

ISW’s October 1 assessment supports the conclusion that Ukrainian counterattacks have disrupted Russian plans around the defensive fortress belt. Its mapping records a net Russian territorial loss for September, but includes Ukrainian gains made earlier and only subsequently disclosed. The monthly total therefore mixes battlefield change with delayed observation. ISW also distinguishes Russian infiltration from established territorial control. Campaign assessment

The MIL assessment is that Ukraine has demonstrated local operational effectiveness. The available evidence doesn’t establish a general Russian collapse or a theater-wide Ukrainian breakthrough. The next test is whether Ukraine can hold recovered positions and disrupt renewed attacks without exhausting the reserves needed elsewhere.

United States and Iran

The Wall Street Journal reported that carrier and amphibious deployments could add 9,000 to 10,000 personnel, with arrivals by the end of November. The National separately reported a U.S. official’s confirmation that the Roosevelt was heading toward the region and noted that it was expected to relieve the George Washington. Force buildup

MIL therefore raises the indicator for preparations to sustain or expand operations. The increase in simultaneous strike capacity remains conditional on arrival dates, overlap, departures, and readiness. Forces underway aren’t equivalent to forces available for immediate combat.

Diplomacy and probability review

For Ukraine, the renewed infrastructure campaign weakens the case that diplomatic support for an energy-strike moratorium is translating into restraint. This review hasn’t established an implemented reciprocal agreement. Negotiation activity, an announced deal, and sustained compliance remain separate outcomes.

For Iran, a diplomatic channel remains open. Reuters reported that Tehran received a U.S. response to its proposal, despite Trump’s public rejection. That establishes continued communication, not convergence on acceptable terms. Diplomatic exchange

The recovered Ukraine baseline contained these probability ranges. They’re retained for continuity, not reissued as current calibrated forecasts. The original target dates and full resolution rules weren’t recovered.

Ukraine outcome	Previous provisional range	This week’s evidence
Continued negotiations	80–90%	Military escalation alone doesn’t resolve this forecast
Implemented limited agreement	25–35%	No implementation established in this review
Broad ceasefire	15–25%	Renewed infrastructure attacks weigh against near-term restraint
Durable settlement	Below 15%	No reviewed development establishes a settlement pathway

No defensible numerical U.S.–Iran update is issued here. The qualitative judgment is that preparations for renewed escalation have strengthened while the route to an agreement remains uncertain. A new probability series needs explicit outcomes, deadlines, and a prospective scoring record before numerical changes can be meaningfully compared.

Deep strikes and retaliation

Ukraine’s most immediate deterioration is in the vulnerability of essential services. Repeated attacks on crossings can disrupt transport even without destroying a bridge. Electricity failures can compound that disruption by affecting water, communications, and repair work.

Zelenskyy’s September 28 address reported more than 120 attacking drones that day, including 90 jet-powered aircraft. Those counts are Ukrainian official reporting. They support tracking the changing composition of attacks, but don’t independently establish interception performance. Official statement

Ukrainian attacks inside Russia also continued. On October 2, Reuters reported a Russian governor’s account of drones targeting industrial facilities in Volgograd. The report doesn’t establish a quantified loss of refinery output from that incident. Strike reporting

In the Iran conflict, Reuters’ sources described possible retaliation against countries supporting U.S. operations and preparations involving allied armed groups. MIL treats that as evidence of contingency planning and deterrent signaling. It doesn’t demonstrate that attacks have been authorized or that every aligned group will act on Tehran’s timetable.

NATO and regional escalation

Russia’s warning over Kaliningrad raised the intensity of nuclear signaling. Reuters reported a diplomatic warning that Moscow could use nuclear weapons if NATO attempted to isolate the exclave. Warning

NATO Secretary General Mark Rutte said there was no imminent threat to alliance territory and that NATO’s assessment hadn’t changed. That response is relevant counterevidence to an interpretation of the warning as proof of an imminent attack. NATO response

The signaling record separates four elements. The observable action was a diplomatic warning. Its apparent signal was deterrence over Kaliningrad. Its audiences included NATO governments and domestic constituencies. The observed reaction was public rejection of the threat and an unchanged NATO threat assessment.

For Iran, the escalation question is whether another U.S. campaign would produce attacks across additional countries or shipping routes. The reviewed planning reports justify closer monitoring, but leave capability, authorization, and execution unresolved.

Sanctions and economic pressure

Physical disruption is the clearest shared economic channel this week. Ukraine faces pressure on electricity and transport. Gulf shipping remains exposed to conflict risk, while restrictions on Iranian trade remain part of the bargaining dispute.

MIL’s inference is that these pressures can raise the costs of continuing the wars without automatically producing concessions. Governments can respond to mounting costs by escalating, adapting, or tightening domestic control.

This edition makes no new sanctions-effectiveness estimate. A proper SC contribution would examine actual throughput, repair times, inventories, alternative routes, and delivery delays. Price changes alone can’t establish the size or persistence of a physical supply loss.

MK-WX weather check

No fresh weather-model run was completed. This edition therefore makes no claim that forecast rain, wind, or sea conditions will cause a specific operational pause.

For the next report, useful inputs are route-specific soil and precipitation conditions in Ukraine, temperatures affecting demand on damaged power systems, and marine conditions affecting Gulf operations. Each forecast should preserve its model, initialization time, horizon, and uncertainty.

CL calibration check

Earlier expectation	Current evidence	Calibration treatment
Continued infrastructure strikes	New grid and bridge attacks	Directionally supported, not a scored hit without the original deadline and event rule
Diplomacy can coexist with escalation	U.S.–Iran exchanges continue alongside military preparations	Qualitatively supported
No rapid Russian breakthrough	Local Ukrainian successes and constrained Russian gains in reviewed reporting	Provisionally consistent, original forecast window unresolved
Increased U.S. strike capacity	Incoming forces reported, carrier relief also expected	Partial support, net available capacity still unresolved
Wider Iranian retaliation	Planning reported	Unresolved, preparation isn’t execution

These are review notes, not a claim that the persistent CL ledger has been updated. No Brier score, calibration improvement, or model-skill claim is justified by this review alone.

Source check

The report uses official Ukrainian statements, original reporting, and attributed open-source analysis. Belligerent claims remain attributed, and multiple republications of one Reuters report count as one reporting chain.

Evidence limitations include delayed disclosure of Ukrainian territorial gains, anonymous sourcing for Iranian planning, uncertain duration of U.S. force overlap, and incomplete independent battle-damage assessment. Source orientation is provenance metadata, not an automatic credibility adjustment.

Trend board

Arrows describe the direction supported by this week’s reviewed evidence. Confidence refers to the stated assessment, not an event probability.

Indicator	Direction	Confidence	Next observable test
Pressure on Ukrainian infrastructure	↑	High	Repeat strikes, outage duration, restoration rates
Evidence of Ukrainian local operational success	↑	Moderate	Durable control and subsequent Russian responses
Implemented Ukraine–Russia restraint	Not established	Limited evidence	Reciprocal terms followed by sustained compliance
Russian nuclear signaling	↑	High	Changes in posture beyond statements
U.S. preparations for sustained or expanded operations	↑	Moderate	Arrivals, departures, overlap, and readiness
Iranian planning for wider retaliation	↑ reported	Moderate	Observable preparations and actual authorization
U.S.–Iran diplomatic communication	Continuing	Moderate	Agreed text followed by implementation

MIL outlook

Over the next seven days, the working expectation is continued pressure on Ukrainian infrastructure alongside contested ground operations. The assessment would materially worsen if repeated attacks create prolonged outages or crossing restrictions faster than repairs and defensive adaptation can compensate.

For U.S.–Iran, the immediate watch is the relationship between force movement and diplomatic behavior. A deployment announcement alone doesn’t establish the date or scale of the next attack. Sustained force overlap, new operational orders, attacks, and verified changes to shipping access would provide stronger evidence.

Ukraine’s local successes and its infrastructure vulnerability can coexist. Washington’s ability to deploy more forces and Tehran’s ability to impose wider costs can also coexist. The next weekly review should test whether either side is converting those capabilities into durable operational or negotiating gains.

MK5-MIL Weekly Report

Russia–Ukraine War — September 18, 2026

The Russia-Ukraine war remains strategically deadlocked, but several pressure points shifted during the past week. Ukraine regained some battlefield initiative around Lyman, the deep-strike campaign against Russian infrastructure expanded, and European governments became more concerned about Russian pressure near NATO territory. The clearest change is the growing separation between the ground war and the infrastructure war. Front-line movement remains slow, while long-range drones and missiles can create strategic effects hundreds of miles away within hours.

Ukraine disrupts Russia around Lyman

Ukraine's Operation Vivaldi has produced one of Kyiv's more notable local successes in recent months. Ukraine's 3rd Army Corps says Ukrainian forces cleared or recaptured about 85 square kilometers northwest of Lyman. Ukrainian forces also attacked Russian logistics as far as 120 kilometers behind the front, forcing Russia to disperse fuel, ammunition, command posts, and other support infrastructure. The Institute for the Study of War assesses that the operation disrupted Russia's attempt to form the northern side of a wider encirclement of Ukraine's fortified cities in Donetsk Oblast. Russia can still attack the same defensive belt from other directions, so the Ukrainian gains don't represent a broad battlefield reversal. MIL reads Operation Vivaldi as evidence that Ukraine can still create local operational surprise when Ukrainian commanders combine drones, electronic warfare, interdiction, and tight operational security. MIL signal: modest improvement for Ukraine, but not a strategic breakthrough.

The deep-strike war is becoming more important

Ukraine continues to hit Russian oil, military, and defense-industrial infrastructure far behind the front. Ukrainian forces struck the Syzran refinery this week along with drone-production facilities and military targets in several Russian regions. Earlier attacks also damaged refinery and industrial infrastructure elsewhere in Russia. The refinery campaign now produces effects beyond Russia's military logistics. Global diesel supplies are already tight, and disruptions to Russian refining have contributed to higher fuel prices. The economic consequences give Washington and other Ukrainian partners reasons to care about which Russian targets Ukraine selects. MIL sees a new linked constraint: successful Ukrainian refinery strikes can reduce Russian refining capacity, tighten fuel markets, increase political pressure abroad, and create greater pressure on Kyiv's target selection. Ukraine's ability to reach a target doesn't automatically mean Ukraine has unlimited political freedom to keep attacking the target. The constraint could become more important if the refinery campaign grows.

Russia is changing the economics of its air campaign

Russia is adapting its own long-range campaign. Russian forces are increasingly using converted RM48U air-defense training missiles for ground attack. More than half of the 228 ballistic and hypersonic missiles Russia launched during July and early August reportedly came from the converted missile family. The RM48U isn't especially accurate, but precision may not be the primary purpose. Large numbers of cheaper weapons can force Ukraine to expend scarce Patriot interceptors while Russia preserves more capable missiles for other missions. Russia is therefore attacking Ukraine's interceptor inventory as well as physical targets. The competition increasingly looks like an exchange-rate problem: Russian missile and drone production versus Ukrainian interceptor production and resupply. Russia doesn't need to win every individual engagement. Moscow gains an advantage if Russian forces can make Ukraine spend defensive weapons faster than Ukraine and its partners can replace them.

Energy negotiations haven't stopped the energy war

Diplomatic activity continues, but negotiations haven't produced a durable halt to infrastructure attacks. Ukrainian President Volodymyr Zelenskyy has said Ukraine is prepared to participate in a reciprocal ceasefire covering energy targets. Russia has also publicly discussed restrictions on energy attacks. Russian and Ukrainian forces continued striking energy-related targets this week despite the diplomatic effort. MIL still sees a limited infrastructure agreement as more plausible than a comprehensive ceasefire. An energy agreement would give both governments something concrete to exchange. Russia can stop attacking Ukrainian energy infrastructure, while Ukraine can stop attacking Russian refineries and related facilities. Territorial disputes, security guarantees, sanctions, and the status of occupied Ukrainian territory would remain unresolved. A narrow agreement could therefore coexist with continued fighting along the front. MIL signal: diplomacy remains active, but negotiations are narrowing toward bounded deals rather than a settlement of the war.

NATO's gray-zone problem is getting harder to ignore

The most important escalation risk isn't necessarily a Russian armored attack on NATO territory. Polish Prime Minister Donald Tusk warned this week that intelligence available to Poland indicates Russia could use drones or missiles against NATO countries while attempting to present the attacks as accidents. European governments are also reporting increased concern about sabotage, cyberattacks, drone incursions, and other hybrid threats. Latvian President Edgars Rinkēvičs separately warned that European air and drone defenses haven't kept pace with the rapid evolution of aerial warfare in Ukraine. The warnings don't prove that Moscow has ordered a specific attack against NATO. They do strengthen a pattern that MIL has been tracking for months. Russia can test NATO without launching an invasion. A drone crossing, sabotage operation, cyberattack, or deliberately ambiguous missile incident could test how quickly NATO members detect an event, attribute responsibility, coordinate politically, and decide whether collective-defense mechanisms apply. Ambiguity becomes part of the weapon. MIL continues to assess a deliberate conventional Russia-NATO war as less likely than continued gray-zone pressure around NATO's eastern flank.

Winter is the next major stress test

Russia is entering another winter with a larger and more adaptable drone and missile arsenal. Newer Russian jet-powered drones are faster and harder for Ukrainian defenses to intercept, while Russia continues to attack Ukrainian infrastructure and logistics. Ukraine is pursuing the opposite pressure campaign against Russian fuel, logistics, air-defense, and defense-industrial systems. The winter campaign could therefore produce two parallel wars. The ground war will continue to revolve around incremental territorial gains, local counterattacks, and attrition. The infrastructure war will move much faster as both countries try to weaken the systems that allow the other side to keep fighting.

MIL outlook

MIL expects continued fighting with bounded negotiations during the next several weeks. Ukraine's success around Lyman weakens one Russian operational plan but doesn't overturn the battlefield. Deep strikes are becoming more strategically important, although fuel-market consequences could constrain Ukraine's freedom to attack Russian refineries. Russia is increasingly trying to exhaust Ukrainian air defenses through volume and cheaper weapons. The NATO perimeter deserves closer attention. A conventional Russian attack remains a different and much larger decision than a deniable drone incursion, sabotage operation, or other ambiguous probe. The most important indicators for the next report are Russian winter strike tempo, Ukrainian refinery attacks, Patriot interceptor availability, progress toward an energy-strike agreement, and any new Russian-linked incident on NATO territory. Overall MIL assessment: strategic deadlock, increasing infrastructure pressure, and rising gray-zone risk around NATO.

The biggest change in this week’s MK5-MIL assessment is that Saudi Arabia’s main workaround for the Strait of Hormuz is now under pressure too. Iran-backed Houthi forces captured the port of Mocha and the strategic island of Mayun at the Bab el-Mandeb, while Saudi Arabia temporarily shut its East-West oil pipeline after a drone attack.

Hormuz remains badly degraded, which had made the Red Sea route increasingly important for Saudi oil exports. Pressure on both routes leaves the regional energy network with fewer practical substitutes if either chokepoint deteriorates further.

The conventional military balance still favors the United States, but Washington hasn’t turned that advantage into a political settlement. Iran still has enough missiles, maritime capability, allied armed groups, and ability to disrupt energy flows to keep the cost of continued pressure high.

What changed this week

Four indicators stand out.

Saudi export workaround: ↑ Under rising pressure

The Houthis captured Mocha on September 10 and Mayun, also known as Perim, on September 11. Mayun sits inside the Bab el-Mandeb, the southern entrance to the Red Sea, and its capture gives the group a more consequential position near one of the world’s most important shipping lanes.

Saudi Arabia had increasingly relied on its East-West pipeline to move crude from the Persian Gulf side of the country to Yanbu on the Red Sea, bypassing Hormuz. By early June, exports through that route had exceeded 5 million barrels per day.

Saudi Arabia temporarily shut the pipeline after a drone attack on September 10. The shutdown didn’t eliminate Saudi exports, but it weakened one of the most important alternatives to Hormuz and increased the importance of longer or more constrained routes through the Red Sea, Suez Canal, and Egypt.

Associated Press

Hormuz disruption: ↑ Rising again

Iran said on September 9 that it attacked 10 vessels near the Strait of Hormuz after U.S. forces sank five Iranian oil tankers. Iran also launched ballistic missiles toward a U.S. base in Jordan.

Visible commercial traffic through Hormuz subsequently fell to seven vessel transits on September 10, compared with roughly 125 large commercial vessels per day before the war. Ships operating without normal tracking signals mean the true number is higher, but commercial traffic remains far from normal.

Reuters

Energy-system stress: ↑ Rising

The International Energy Agency now expects global oil supply to fall by 5.7 million barrels per day in 2026, or about 6%. Saudi crude supply fell to 6 million barrels per day in August, its lowest level in more than three decades, while global inventories declined at a rate of 3.1 million barrels per day.

That leaves the market with less room to absorb another major disruption. Earlier in the war, inventories, alternative routes, spare capacity, and demand reductions helped soften the shock. Those buffers are becoming less effective as the conflict drags on.

Reuters

Negotiation pressure: ↑ Rising

Higher energy costs are giving both sides more reason to explore a limited maritime agreement even though the broader political dispute remains unresolved. A narrow arrangement over commercial shipping would be easier to reach than a comprehensive settlement covering sanctions, nuclear policy, missiles, and regional security.

That doesn’t mean a maritime deal is close. It means the incentives to contain one of the war’s most expensive pressure points are stronger than they were a few weeks ago.

Regional energy network

This week’s strongest strategic development is the growing interaction between Hormuz and Bab el-Mandeb.

When Hormuz became unreliable, Saudi Arabia increased use of the East-West pipeline to move crude to the Red Sea. Tankers leaving Yanbu could then travel south through Bab el-Mandeb toward Asian customers, reducing Saudi dependence on the Persian Gulf chokepoint.

The Houthi advance now reduces the value of that workaround. Red Sea shipping had already fallen sharply because of earlier Houthi attacks, and the seizure of territory around Bab el-Mandeb puts more pressure on a route that had become more important during the Iran war.

Saudi Arabia still has options, but none is a perfect substitute. Oil can travel north through the Red Sea toward the Suez Canal or Egypt’s pipeline system, while other Gulf producers have their own routes around Hormuz. Those alternatives are longer, more expensive, or more limited in capacity.

MK5-SC therefore sees a regional energy network losing redundancy rather than two isolated chokepoints failing independently.

Trend: ↑ Network pressure rising

Confidence: High

Strait of Hormuz

Hormuz remains the conflict’s main maritime pressure point.

Commercial vessel tracking showed only seven visible commodity-ship crossings on September 10. The recent 10-day average was 15, compared with about 125 large commercial vessels per day before the war.

The true flow is larger because some tankers are crossing with Automatic Identification System tracking disabled. A tanker that disappears from commercial tracking hasn’t necessarily stopped moving oil, so visible traffic can make the physical disruption look worse than it is.

The opposite problem matters too. Dark crossings, military escorts, delayed departures, altered routes, higher insurance costs, and reduced traffic all show that the shipping system is operating under severe stress even when oil continues to move.

MK5-SC therefore continues to classify Hormuz as a degraded network constraint rather than a completely closed strait.

Trend: ↑ Disruption rising

Confidence: High that normal commercial shipping remains severely impaired; medium on precise physical throughput

Energy pressure

The global oil system has less room to absorb additional disruption than it did earlier in the war.

The IEA expects world oil supply to decline by 5.7 million barrels per day this year. Saudi output fell by 2.3 million barrels per day in August to 6 million, while global stocks were drawn down at a record rate.

Demand is also falling because of high prices, but supply is falling faster. That imbalance keeps pressure on crude and refined fuels even when markets briefly respond to diplomatic optimism.

Reuters

Brent crude briefly approached $110 this week before retreating on September 11. Even after the decline, it remained above $100 and more than 8% higher for the week.

Reuters

U.S. refining capacity adds another constraint. Refineries are already operating near their practical limits, which reduces the country’s ability to offset a global supply shock simply by producing more domestic crude.

The economic effects are becoming more visible outside energy markets. The University of Michigan’s preliminary September consumer-sentiment index fell to 47.8 from 51.7 in August, while one-year inflation expectations rose from 4.0% to 4.6%. Higher gasoline prices were among the pressures consumers cited.

Reuters

MIL doesn’t assume that fuel prices automatically determine U.S. military policy. They do, however, increase the domestic economic cost of maintaining the current strategy.

Trend: ↑ Strategic importance rising

Confidence: High that the economic effect is material; medium on how strongly it changes U.S. decision-making

Diplomacy

The case for renewed negotiations is stronger than the case for an imminent peace agreement.

The maritime problem offers a narrower bargaining space than the larger conflict. Both governments could benefit from reducing attacks on commercial shipping without resolving every dispute between them, which makes a limited Hormuz or maritime arrangement more plausible than a comprehensive settlement.

Frozen MK5-MIL model estimates

These are model judgments rather than empirically calibrated probabilities. This report freezes them as the September 11 baseline for future CL scoring.

• Substantive U.S.-Iran negotiations within 1–2 months: 65–75%
• Limited Hormuz or maritime agreement: 35–45%
• Broad ceasefire covering most direct fighting: 20–30%
• Durable political settlement: under 15%

The model expects diplomatic activity because the economic costs of the conflict are increasing for Iran, the United States, Gulf exporters, energy importers, and commercial shipping. It remains skeptical of a comprehensive settlement because sanctions, nuclear policy, missile capabilities, regional influence, and security guarantees are much harder to resolve than navigation through one strait.

Military balance

The conventional balance hasn’t materially changed.

The United States can strike Iranian military infrastructure, destroy ships, maintain substantial regional forces, and escort commercial traffic at a scale Iran can’t match conventionally. Iran doesn’t need conventional parity to impose costs, though.

Tehran needs enough surviving capability to make U.S. pressure expensive through missiles, drones, maritime attacks, allied armed groups, and disruption of regional energy flows. The September 9 exchange shows that Iran still has meaningful retaliatory capacity despite months of military and economic pressure.

MIL therefore continues to classify the war as an asymmetric coercive contest rather than a conventional contest Iran could plausibly win outright.

The main escalation indicator is whether retaliation remains calibrated. If U.S. strikes produce bounded Iranian responses and Iranian attacks produce limited U.S. retaliation, the conflict can remain violent but contained. If each response begins producing a larger counter-response, escalation can become driven increasingly by feedback rather than deliberate control.

Trend: ↑ Escalation pressure rising

Confidence: High

Iranian economic pressure

Washington’s economic strategy is producing substantial effects.

Sanctions and the maritime blockade have reduced Iranian oil revenue, restricted access to foreign currency, lowered imports, and increased domestic economic pressure.

Reuters

The unresolved question is whether economic deterioration translates into political concessions. Economic pain and political capitulation aren’t the same thing, and Iran still has ways to soften some of the pressure.

Reuters reported on September 10 that Iranian oil revenue can be converted into credits for Chinese goods through a barter-like mechanism outside conventional Western-controlled banking channels. The reporting supports the existence and structure of the mechanism, though some specific alleged transactions remain unverified.

Reuters

MIL therefore doesn’t treat worsening Iranian economic conditions as evidence that capitulation is imminent.

Trend: ↑ Pressure rising

Confidence: High on economic deterioration; low-to-medium on its political effect

DCT transition check

DCT sees more structural stress than it did during the quieter phase of the war.

The United States has weakened Iran’s maritime capabilities, but normal shipping through Hormuz hasn’t returned. Economic coercion is hurting Iran, while Iranian retaliation is again raising global energy costs. Saudi Arabia used the Red Sea to reduce dependence on Hormuz, but Houthi advances are now putting more pressure on that workaround.

Those relationships suggest the previous coercive equilibrium is becoming less stable.

There is still evidence of restraint. Saudi Arabia didn’t immediately launch a major military response after the pipeline attack, and outside governments continue pressing for maritime negotiations.

DCT therefore classifies the system as transition-prone rather than already operating under a fundamentally new regime.

Discordance: ↑ Rising

Coherence: ↓ Falling

Transition pressure: ↑ Rising

Confidence: Medium-high

CL calibration check

This is the first Iran-U.S. report frozen in this formal weekly format, so CL shouldn’t retroactively manufacture precise forecasts from earlier qualitative analysis.

This report establishes the baseline for future scoring.

Frozen forecasts

• Substantive negotiations within 1–2 months: 65–75%
• Limited Hormuz or maritime agreement: 35–45%
• Broad ceasefire: 20–30%
• Durable political settlement: under 15%
• Continued severe maritime disruption: favored
• Continued Iranian economic deterioration: favored
• Continued regional proxy pressure: favored
• Fundamental expansion into a substantially larger conventional war: not the baseline

Future reports can now resolve or update these estimates against an explicit prior record.

CL should also track whether MIL identifies the mechanisms driving change rather than only whether an event happens. The principal mechanisms frozen for this cycle are maritime coercion, Iranian economic endurance, U.S. economic feedback, regional proxy activity, and the availability of a narrow maritime off-ramp.

Source check

Evidence quality is relatively strong for the central claims in this week’s report.

High-confidence evidence includes IEA oil-supply estimates, commercial vessel-tracking data, market prices, official Saudi statements, and the University of Michigan consumer survey.

Medium-to-high-confidence evidence includes Reuters and Associated Press reporting based on multiple government, regional, shipping, and industry sources.

Medium-confidence evidence includes estimates of actual Gulf oil movement because ships increasingly disable tracking systems. Different analytics firms can therefore produce materially different estimates of physical throughput.

Lower-confidence evidence includes individual U.S., Iranian, Houthi, or militia claims about successful strikes, damage, interceptions, or casualties when independent confirmation is unavailable.

MIL should therefore distinguish confirmed attack activity from claimed tactical success.

Trend board

• U.S. conventional military advantage: → Stable
• Iranian conventional capability: → Degraded but persistent
• Iranian maritime disruption: ↑
• Hormuz shipping conditions: ↓
• Saudi alternative-route resilience: ↓
• Iranian economic pressure: ↑
• U.S. economic exposure to the war: ↑
• Negotiation activity: ↑
• Limited maritime-deal probability: ↑
• Broad peace probability: → Low
• Houthi regional pressure: ↑ Strongly
• Bab el-Mandeb risk: ↑ Strongly
• Global energy-system stress: ↑
• Major uncontrolled escalation risk: ↑
• Immediate large U.S. ground-war risk: → Low

MIL outlook

The most likely near-term path remains continued conflict accompanied by more serious attempts to negotiate around specific parts of the war.

The United States still has enough military power to keep degrading Iranian capabilities and restricting Iranian oil exports. Iran still has enough asymmetric capacity to keep that strategy costly, and the Houthi advance makes the regional energy problem harder because it reduces the usefulness of routing exports around Hormuz.

Iran’s own economic position is also getting worse. Washington is trying to make continued Iranian resistance more expensive than compromise, while Tehran is trying to make continued U.S. pressure more expensive than compromise.

Neither side has yet shown that it can force the other across that threshold.

A limited maritime arrangement therefore remains more plausible than a comprehensive settlement because it addresses one of the highest-cost parts of the conflict without requiring either government to settle every underlying dispute. The danger is that both sides may instead conclude that another round of escalation would improve their bargaining position.

Bottom line

MIL sees no decisive military conclusion this week. The most important change is in the regional energy network, where Saudi Arabia’s principal route around Hormuz is now under greater pressure just as Hormuz itself remains severely degraded.

Washington’s economic strategy continues to impose serious costs on Iran, but Iran and allied groups still have enough asymmetric capability to push part of those costs back into the global economy. DCT therefore sees the current coercive equilibrium becoming less stable, while SC sees fewer substitutes available if another major route or piece of infrastructure fails.

MIL continues to favor prolonged coercive bargaining over either decisive military victory or near-term comprehensive peace. The main thing to watch now is whether the pressure produces a narrow maritime agreement before another retaliation cycle pushes the conflict into a more difficult regional phase.

The biggest change in this week’s MK5-MIL assessment is on the battlefield. Ukraine’s Operation Vivaldi has disrupted Russia’s northern approach toward the Donetsk Fortress Belt and shown that Ukrainian forces can still create local operational surprise after years of increasingly static warfare.

The second major shift is happening farther behind the lines. Ukrainian refinery strikes are now disrupting a substantial share of Russian diesel production, while Russia has found a way to sustain its missile campaign with converted training weapons as Ukraine’s Patriot interceptor supply becomes dangerously thin.

Russia’s confrontation with NATO is also becoming harder to separate from the war itself. European governments reported another series of drone incursions, border incidents, and hybrid threats this week, while Poland publicly warned that Moscow could deliberately stage attacks designed to look accidental.

What changed this week

Four indicators stand out.

Russian breakthrough risk: ↓ Lower

Ukraine’s Operation Vivaldi has damaged Russia’s attempt to approach Sloviansk and the wider Fortress Belt from the north.

Ukraine’s 3rd Army Corps says Ukrainian forces cleared or retook about 85 square kilometers north of Lyman. ISW assesses that Ukraine combined operational secrecy, intermediate-range strikes, counter-drone systems, and attacks on Russian electronic warfare and logistics to create local tactical maneuver.

Russia hasn’t abandoned the larger Donetsk campaign. Russian forces are moving armor and drone-support assets toward the Dobropillya direction, which could support renewed mechanized attacks from the south during the fall.

Institute for the Study of War (Institute for the Study of War)

Negotiation activity: → High, but stalled

The energy ceasefire discussed this week hasn’t become an operational agreement.

President Donald Trump said Russia and Ukraine had agreed to stop attacking each other’s energy infrastructure. Neither government subsequently confirmed a completed agreement, and both countries continued hitting energy targets.

Ukraine says it will stop its refinery campaign if Russia gives a credible reciprocal commitment. The Kremlin has welcomed the general idea but has attached additional demands involving sanctions and maritime exports.

Reuters (Reuters)

Ukrainian deep-strike pressure: ↑ Strongly rising

The refinery campaign has moved beyond isolated disruption.

Reuters reported this week that three of Russia’s six largest diesel-producing refineries had either sharply reduced production or stopped operating after drone attacks. Those six facilities normally account for roughly half of Russian diesel production.

The consequences are now feeding back into Western policy. Trump publicly called on Ukraine to stop attacking Russian diesel infrastructure as global diesel supplies tightened and U.S. prices climbed.

Reuters (Reuters)

Russian gray-zone pressure against NATO: ↑ Rising

NATO fighters shot down a drone over Lithuania this week, the first interception of its kind in Lithuanian airspace. Lithuania hasn’t established that Russia deliberately sent the drone across the border, and officials said an investigation was still underway.

Polish Prime Minister Donald Tusk went further on September 17. Tusk said intelligence available to Poland indicates Russia may deliberately launch drone or missile attacks against NATO countries and portray the incidents as accidents to complicate the alliance’s response.

France separately said September 18 that Russian hybrid activity against Europe has intensified and announced plans for stronger protection of critical infrastructure.

AP and Reuters (AP News)

Battlefield

The battlefield picture improved modestly for Ukraine this week.

Operation Vivaldi is the most important development. Ukrainian forces counterattacked the Russian salient north of Lyman after months of Russian efforts to position forces for a wider encirclement of Ukraine’s defensive belt around Sloviansk, Kramatorsk, Druzhkivka, and Kostyantynivka.

Ukrainian commander Andrii Biletskyi says the operation disrupted Russia’s planned northern pincer. ISW considers Ukraine’s performance significant because Ukrainian forces managed to restore limited tactical maneuver in an environment dominated by drones, mines, artillery, and persistent surveillance.

The method matters almost as much as the territory.

Ukraine attacked Russian fuel and logistics networks in occupied Luhansk, weakening electronic warfare systems that depend on diesel generators. Ukrainian forces simultaneously used counter-drone systems and operational secrecy to reduce Russian awareness of the developing counterattack.

Institute for the Study of War (Institute for the Study of War)

Russia still has options. Russian commanders are concentrating armored equipment around Dobropillya and may attempt mechanized attacks against the southern side of the Fortress Belt as fall weather changes battlefield conditions.

MIL therefore doesn’t interpret Operation Vivaldi as the beginning of a broad Ukrainian counteroffensive. The operation does weaken the case that Russia can convert persistent offensive pressure into an inevitable breakthrough.

Trend: ↑ Modest improvement for Ukraine

Confidence: High that Russia’s northern plan was disrupted; medium on how much operational freedom Ukraine can recover

Diplomacy

Diplomacy produced more activity than restraint this week.

Washington pushed for a moratorium on attacks against energy infrastructure after Ukrainian strikes damaged Russian refineries and global diesel prices climbed. Ukraine said it was prepared to participate if Russia genuinely stopped attacking Ukrainian energy targets.

The Kremlin called the proposal a good idea but also demanded protection for Russian maritime exports and relief from sanctions.

The battlefield response was immediate. Russia struck petrol stations and other infrastructure in Ukraine on September 15, while Ukraine attacked the Syzran refinery and Russian drone-production facilities.

Reuters (Reuters)

The episode strengthens a distinction MIL has been making for several weeks. Negotiation activity doesn’t necessarily indicate declining escalation.

Russia, Ukraine, and the United States can negotiate while both combatants simultaneously increase military and economic pressure. Bargaining and escalation are occurring together.

Current MIL probabilities

• Substantive negotiations within 1–2 months: 80–90% ↑
• Limited or sector-specific agreement: 35–45% ↑
• Broad ceasefire covering most combat: 15–25% →
• Durable political settlement: under 15% →

The probability of a limited agreement rises because Washington is now actively pushing a specific reciprocal arrangement involving energy targets. MIL doesn’t raise the broader ceasefire estimate because the territorial and security disputes remain unresolved.

Ukrainian deep strikes

Ukraine’s refinery campaign is becoming one of the strongest strategic pressure mechanisms available to Kyiv.

Reuters reported September 15 that half of Russia’s six largest diesel-producing refineries had substantially reduced output or shut down after drone attacks. The Kirishi refinery was offline, while Volgograd and NORSI were reportedly operating at roughly one-quarter capacity.

Ukraine then struck the Yaroslavl refinery on September 17. Reuters reported that the facility halted crude processing after the attack.

Reuters (Reuters)

The campaign has now created a feedback loop that MIL didn’t treat as a major constraint earlier in the war.

Ukrainian strikes reduce Russian refining capacity. Reduced production tightens global diesel supplies. Higher prices create economic pressure outside Russia. Governments supporting Ukraine then gain incentives to influence Kyiv’s target selection.

Trump’s September 13 request that Zelensky stop targeting Russian diesel infrastructure is direct evidence that the loop has become politically relevant.

Reuters (Reuters)

Ukraine therefore faces two separate questions when selecting targets.

The first is whether Ukrainian forces can hit the target. The second is whether the economic consequences of a successful strike will create enough pressure among Ukraine’s partners to limit future attacks.

MIL still assesses the refinery campaign as strategically consequential. The new constraint is that greater effectiveness may also produce greater diplomatic resistance.

Trend: ↑ Strongly rising

Confidence: High

Russia’s changing missile campaign

Russia has also found a new way to increase pressure without exhausting its best missiles.

Reuters reported September 18 that Russia is using RM48U missiles, originally designed as training targets for S-400 air-defense systems, as ballistic strike weapons against Ukraine.

The scale is substantial. RM48Us accounted for more than half of the 228 ballistic and hypersonic missiles fired during July and the first eight days of August, according to Ukrainian government data reviewed by Reuters.

Reuters (Reuters)

The weapons are less accurate than Iskander ballistic missiles, but lower accuracy doesn’t make the strategy irrelevant.

Russia can use RM48Us against lower-value targets while preserving Iskanders and other advanced weapons. Large salvos also force Ukraine to expend scarce interceptors.

Ukraine has nearly exhausted its Patriot interceptor inventory, according to Reuters, while additional interceptors remain in high demand elsewhere.

The resulting contest isn’t simply missile against missile.

Russia is trying to make the cost of Ukrainian defense unsustainable by combining cheap drones, converted missiles, and more capable weapons. Ukraine must decide which threats justify firing a scarce interceptor.

Winter makes the exchange more important. Russia can preserve higher-quality missiles for attacks against electricity, heating, transportation, and industrial infrastructure when cold weather makes damage more consequential.

Trend: ↑ Russian long-range pressure increasing

Confidence: High

NATO escalation and the gray zone

The conventional Russia-NATO war indicator remains low, but the gray-zone indicator rose again.

NATO fighters shot down a drone that entered Lithuanian airspace on September 15. Lithuanian officials said the aircraft may have carried explosives but didn’t initially determine whether Russia deliberately sent the drone into NATO territory.

AP (AP News)

The ambiguity is important.

Lithuanian President Gitanas Nausėda said Russia may be intentionally allowing some drones to stray into NATO airspace as a way to punish countries supporting Ukraine. Poland is making a stronger warning.

Tusk told parliament September 17 that Russia could deliberately stage drone or missile attacks against NATO members and present the strikes as accidents. Tusk argued that ambiguity could delay or weaken the political response inside NATO.

AP (AP News)

France also said this week that Russian hybrid operations are intensifying. President Emmanuel Macron cited drone and cyber threats and ordered planning for stronger protection of French critical infrastructure.

Russia denies Western accusations that Moscow is conducting a hybrid campaign against Europe.

Reuters (Reuters)

MIL continues to treat conventional war and gray-zone activity as separate indicators.

MIL probabilities

• Deliberate conventional Russian attack on NATO in the next several months: below 10% →
• Continued sabotage, cyber operations, drone incursions, infrastructure interference, covert action, or other gray-zone activity against NATO countries: 80–90% ↑

The gray-zone estimate doesn’t represent the probability of NATO-Russia war. MIL is measuring activity designed to pressure NATO while avoiding an unmistakable conventional attack.

The most dangerous scenario is an incident in which Russia expects ambiguity to contain escalation but NATO governments interpret the same incident as deliberate armed aggression.

Sanctions and economic pressure

The sanctions track also moved this week.

The U.S. House passed the Lindsey O. Graham Sanctioning Russia and Iran Act on September 16 after the Senate approved the legislation in August. Trump signed the legislation on September 18.

The law targets Russian energy and defense industries and the Russian shadow fleet. The legislation also gives the president authority to impose tariffs on major countries that continue buying Russian energy.

Reuters (Reuters)

MIL treats the sanctions package as another constraint rather than a standalone war-ending mechanism.

The more important question is how several pressures interact: sanctions, refinery damage, declining fuel exports, military spending, manpower losses, and the continuing cost of replacing equipment.

Russia retains substantial capacity to continue the war. The accumulated constraints matter because Moscow must manage all of them simultaneously.

Trend: ↑ Economic pressure

Confidence: High that pressure is increasing; low that sanctions alone will force a near-term change in Russian war aims

MK-WX weather check

Weather isn’t restricting operations around Sloviansk yet.

Conditions around the northern Donetsk battlefield remain generally dry and mild, with temperatures around the low-to-mid 70s Fahrenheit through the weekend. Rain becomes more possible early next week as temperatures begin dropping.

ISW has already noted that deteriorating conditions and declining foliage are making infiltration more difficult in some sectors.

Institute for the Study of War (Institute for the Study of War)

The seasonal transition deserves more attention than the immediate forecast.

Drier ground can support mechanized movement, which matters because Russia is reportedly accumulating armor around Dobropillya. Persistent autumn rain would eventually reduce off-road mobility while falling foliage changes concealment for infantry, vehicles, and drone teams.

WX impact this week: Low

Trend to watch: ↑ Seasonal importance increasing

MIL shouldn’t use weather to explain current battlefield movement, but weather could begin affecting Russian and Ukrainian tactical choices during the next few weeks.

CL calibration check

Several September 11 predictions can now be scored more clearly.

Russian operational breakthrough remains unlikely — HIT

Russia didn’t produce the decisive breakthrough MIL considered unlikely. Ukraine instead disrupted Russia’s northern approach toward the Fortress Belt around Lyman.

Renewed negotiations remain likely — HIT

Washington pushed a specific energy-strike proposal this week, and both Kyiv and Moscow publicly engaged with the idea.

The stronger prediction of a meaningful ceasefire remains unresolved.

Limited ceasefire arrangement — PARTIAL HIT

A concrete energy moratorium moved onto the diplomatic agenda, which supports the underlying forecast. Russia and Ukraine haven’t implemented the arrangement, and both continued striking energy targets.

MIL should therefore distinguish negotiating a sector-specific agreement from actually enforcing one.

Direct Russian attack on NATO remains unlikely — HIT SO FAR

No confirmed deliberate conventional Russian attack on NATO occurred.

The Lithuanian drone incident reinforces the importance of keeping accidental, ambiguous, gray-zone, and overt conventional incidents in separate categories.

Russian gray-zone activity remains likely — HIT

European governments reported additional drone, cyber, infrastructure, and other hybrid threats. France now says Russian hybrid pressure has intensified, while Poland is publicly preparing for deliberately ambiguous attacks.

Ukrainian deep strikes will become strategically consequential — HIT, WITH STRONGER EVIDENCE

The evidence strengthened considerably this week.

Three of Russia’s six leading diesel refineries reduced or halted production, another major refinery stopped crude processing after a strike, and the resulting fuel-market pressure was strong enough to produce a public request from Washington for Ukraine to change its target selection.

Calibration result

MIL’s strongest calls remain the deep-strike and gray-zone forecasts.

The battlefield model also performed well by resisting the temptation to extrapolate steady Russian pressure into an imminent operational breakthrough.

The ceasefire model still needs tighter wording. MIL has been better at forecasting the return of negotiations than forecasting whether governments can convert negotiations into enforceable agreements.

CL should therefore continue separating three stages: talks beginning, an agreement being announced, and an agreement actually changing military behavior.

Source check

This week’s strongest evidence comes from refinery operating data, Reuters reporting based on fuel-market sources, publicly documented U.S. legislation, official NATO-country statements, and battlefield assessments supported by geolocated material.

The refinery story is particularly strong because the effects aren’t based solely on Ukrainian battle-damage claims. Reuters independently reported production shutdowns using information from market participants and industry sources.

Reuters (Reuters)

The RM48U assessment is also stronger than a typical battlefield claim. Reuters reviewed Ukrainian missile data and interviewed independent weapons experts, although Reuters couldn’t independently verify every Ukrainian forensic conclusion about individual strikes.

Reuters (Reuters)

The NATO section requires more caution.

Poland’s warning about possible deliberate Russian attacks is an intelligence-based government assessment, not evidence that Moscow has already ordered a specific operation. The Lithuanian drone incident is confirmed, but Lithuania hasn’t established publicly that the airspace violation was intentional.

MIL therefore treats the broader gray-zone pattern as strong while keeping individual attribution claims provisional unless investigators establish responsibility.

Trend board

• Russian territorial momentum: ↓ Weaker
• Ukrainian battlefield position: ↑ Modestly improving
• Negotiation activity: → High
• Limited agreement probability: ↑
• Broad ceasefire probability: → Low
• Ukrainian deep-strike effectiveness: ↑ Strongly
• Political constraints on Ukrainian target selection: ↑
• Russian missile pressure: ↑
• Ukrainian air-defense pressure: ↑ Strongly
• Russian economic exposure: ↑
• Russian gray-zone activity against NATO: ↑
• Direct NATO-Russia war risk: → Low
• Weather influence on operations: → Low now, increasing seasonally

MIL outlook

The dominant MIL scenario remains prolonged warfare with negotiations running alongside escalation.

Ukraine’s counterattack around Lyman weakens one important Russian campaign design without changing the entire war. Russia still has substantial offensive capacity and is preparing additional pressure elsewhere along the Fortress Belt.

The long-range war is moving faster.

Ukraine is imposing measurable costs on Russian fuel production and military infrastructure. Russia is expanding the volume of its missile campaign while exploiting Ukraine’s shortage of Patriot interceptors.

Both strategies are producing second-order effects. Ukrainian refinery attacks now influence global fuel markets and Western diplomacy. Russian missile adaptation increases the burden on Western air-defense production and forces Ukraine to make harder choices about which targets to defend.

The NATO problem is developing along the same lines.

Russia doesn’t need to invade NATO territory to impose costs or test the alliance. Drone incursions, sabotage, cyber operations, infrastructure threats, and ambiguous border incidents can measure NATO’s political and military response while keeping responsibility contested.

MIL therefore sees three increasingly connected contests: the battlefield in Ukraine, the infrastructure war behind the front, and the gray-zone confrontation between Russia and NATO. MIL sees a modest but meaningful improvement in Ukraine’s battlefield position this week.

Operation Vivaldi disrupted Russia’s northern approach toward the Donetsk Fortress Belt and showed that tactical maneuver hasn’t disappeared completely from the war.

The larger strategic change remains the infrastructure contest. Ukrainian strikes are disrupting major Russian refineries badly enough to affect global fuel politics, while Russia is using converted missiles to sustain an increasingly intense air campaign against a depleted Ukrainian air-defense network.

Russian gray-zone activity around NATO remains the most important escalation indicator outside Ukraine. European governments are increasingly treating drone incursions, cyberattacks, sabotage, and infrastructure threats as parts of a persistent campaign rather than isolated events.

CL says MIL’s strongest forecasts remain deep strikes, gray-zone escalation, and the absence of a rapid Russian breakthrough. Diplomacy remains the hardest part of the model to calibrate because negotiations can intensify without producing restraint.

For now, the dominant path remains the same: prolonged fighting, expanding pressure far beyond the front line, rising economic and infrastructure costs, and diplomacy conducted from inside the war rather than after it.