The Ukraine frontline barely moved this week — and that stasis is now the story. The Institute for the Study of War (ISW) assesses that a prominent Kremlin-affiliated military blogger has embraced what ISW calls Vladimir Putin's new "theory of victory": expansive combined ballistic-missile and jet-powered drone strikes aimed at forcing Ukraine to capitulate over the winter of 2026-2027. The blogger acknowledged that the frontline is "static" — which ISW describes as a tacit acknowledgement of Russia's near-zero net battlefield advances in recent months.
This week's Ukraine frontline update covers the shift from maneuver to missile campaign, Ukrainian counterattacks in the east, and the incidents — from Romanian airspace to Munich sabotage investigations — that show the war's pressure on Europe widening.
Key takeaways
- ISW assesses that Moscow is shifting its theory of victory toward a massive long-range strike campaign meant to force Ukraine's surrender before spring 2027, as ground advances have stalled.
- Ukrainian President Volodymyr Zelensky stated on September 26 that Russia plans to spend $12 billion producing jet-powered drones and loitering munitions; he also reported Ukraine is intercepting 55% of Russia's jet-powered Shaheds.
- Ukrainian forces recently advanced in the Chasiv Yar tactical area and the Oleksandrivka direction, and are systematically targeting Russian infiltration tactics around Lyman.
- A likely Russian drone entered Romanian airspace on the night of September 26-27, and German investigators suspect Russian intelligence behind sabotage attacks in Munich.
Contents
- A static front and a new theory of victory
- The winter strike campaign: drones, missiles, and energy
- Ground fighting: Lyman, Chasiv Yar, and the east
- Beyond the frontline: Romania and sabotage in Europe
- What to watch this week
A static front and a new theory of victory
The central finding of ISW's September 27 assessment is blunt: after months of grinding combat, the frontline is "static." ISW treats the milblogger's admission as a tacit acknowledgement of Russia's near-zero net battlefield advances in recent months. Instead of relying on the earlier assumption that the Russian military could keep advancing indefinitely, Putin now appears to be reevaluating in favor of a strike campaign designed to force Ukraine to capitulate before spring 2027.
The strategy is expensive, and Ukrainian forces are escalating their own strikes against targets inside Russia.
Ukraine "must feel" Russia's "retaliatory" strikes — Vladimir Putin, September 25, 2026, as reported by ISW
Putin remains unlikely to compromise his demands or engage in serious ceasefire negotiations until his new theory has run its course, ISW assessed — a read that dims near-term hopes for talks.
The winter strike campaign: drones, missiles, and energy
The strike campaign is already the war's dominant rhythm. Russian forces began intensifying their use of jet-powered drones in late April 2026. On the night of September 26-27, the milblogger claimed Russian forces launched mostly jet-powered Geran-5 drones against Odesa, Mykolaiv and Kyiv, arguing that Russia's diverse strike arsenal and Ukraine's air-defense shortages allow Moscow to maintain the current pace of strikes and expand its target types.
Kyiv is responding with interception. Zelensky stated on September 26 that Ukraine's interception rate of jet-powered Shahed drones is now 55%, with Ukrainian air defenses having intercepted more than 1,500 of the 2,730 such drones Russia launched in September 2026. Ukrainian Presidential Office Head Kyrylo Budanov stated on September 27 that Ukraine is testing interceptor-drone prototypes in combat conditions, with mass use possible within a few months. ISW cautions it remains unclear whether the program can scale fast enough to disrupt the intensifying winter campaign.
The stakes center on Ukraine's energy grid. The milblogger noted that the current strategy imposes significant economic costs on Ukraine but warned that sustaining it long-term could cost more than it achieves. As ISW assessed, the campaign relies on Ukraine's inability to intercept jet-powered drones, its shortage of Patriot interceptors against ballistic missiles this winter, and the assumption that Ukraine's energy infrastructure cannot withstand months of strikes. Russia's parallel campaign against civilian infrastructure has included strikes on Ukrainian telecom and data centers — covered in our report on [Russia's campaign against Kyivstar](/articles/2026-09-28-russia-hits-kyivstar-telecom-campaign) and [strikes on Ukrainian telecom data centres](/articles/2026-09-27-russia-strikes-ukrainian-telecom-data-centres).
Ukraine is hitting back deep inside Russia. ISW's September 27 assessment notes Ukrainian strikes continue to restrain Russia's oil processing capacity: Ukrainian Center for Countering Disinformation head Andriy Kovalenko reported on September 26 that recent Ukrainian strikes against the Perm and Novoshakhtynsk oil refineries caused both to cease operations.
Ground fighting: Lyman, Chasiv Yar, and the east
While the strategic picture tilts toward the skies, the ground war grinds on. Ukraine's General Staff reported 175 combat engagements on September 26 alone — Russia carried out 57 airstrikes using 186 guided aerial bombs, deployed 6,681 kamikaze drones and 2,013 bombardments. The Pokrovsk direction saw 26 Russian attacks and Kostiantynivka 22.
ISW's September 26 assessment reports a notable Ukrainian tactical shift: Ukrainian forces appear to be targeting Russian efforts to reinforce initial infiltrations rather than clearing infiltrators immediately. A Ukrainian battalion commander reported on September 26 that the first phase of Operation Vivaldi in the Lyman direction focused on defeating Russian infiltration groups by striking Russian all-terrain vehicle and motorcycle assaults attempting to reinforce groups behind Ukrainian advances. Strikes on Russian supply routes left many Russian infiltration groups demoralized and without proper supplies.
ISW also reports Ukrainian forces recently advanced in the Chasiv Yar tactical area and the Oleksandrivka direction, and east of Slovyansk and in western Zaporizhia Oblast. Russian milbloggers continue to emphasize how a pervasive culture of lying within the Russian military is facilitating Ukrainian successes north and northeast of Lyman — an unusually candid admission.
Beyond the frontline: Romania and sabotage in Europe
The war's spillover continues to test NATO territory. ISW reported that an unidentified aerial object that was likely a Russian drone entered Romanian airspace on the night of September 26-27. Romania's Ministry of National Defense reported that radar detected an unknown aerial vehicle near Chilia Veche, on Romania's river border with Ukraine; the drone flew parallel to the Chilia branch of the Danube Delta before Romania lost its signal near Pardina. Two Spanish F-18 fighter jets and a Romanian helicopter scrambled to monitor the vehicle. Romanian authorities have not publicly attributed the incursion to Russia, but ISW assesses it is likely part of the Kremlin's efforts to normalize European airspace violations.
Separately, European security officials continue to investigate sabotage against European defense and logistics infrastructure. German newswire FAZ reported on September 25, citing German security officials, that investigators suspect Russia's GRU of using incendiary devices to attack the Munich headquarters of technology and defense companies Rohde & Schwarz and Helsing on September 3. FAZ reported that Helsing supplies the Ukrainian military, that the GRU team was operating out of Slovakia, and that authorities recently thwarted a suspected GRU sabotage attempt in Slovakia. German security sources also linked the GRU's purported Head of Sabotage Operations, Denis Smolyaninov, to attacks on Leipzig Airport on August 5, an incident German authorities have publicly attributed to Russia.
What to watch this week
Three things will define the coming days. The interception race: whether Ukraine's interceptor drones can scale before Russia's jet-powered Geran campaign intensifies into winter, and whether Patriot stocks hold against ballistic strikes. The static front: whether Ukraine's infiltration-disruption tactics around Lyman and advances near Chasiv Yar can turn a "static" frontline into a Ukrainian advantage. Escalation by incident: with drones crossing into Romanian airspace and sabotage investigations active in Germany and Denmark, Europe's tolerance for the Kremlin's pressure campaign is being tested alongside Ukraine's defenses.
