Kostiantynivka July 2026: Putin's False Capture Claim and Ukraine's Flag-Raising Operation

Two weeks later, soldiers from Ukraine's 425th Separate Assault Regiment "Skelya" (also transliterated as "Skala" or "The Rock") conducted a clearing operation, killed remaining Russian personnel, and raised the Ukrainian flag over a building in the city center . Here is the source-verified timeline of what really happened.

The July 3 Claim vs. Ground Reality

The Russian Defense Ministry's announcement via General Valery Gerasimov was immediately rejected by independent analysts and Ukrainian officials alike:

• Institute for the Study of War (ISW) assessed that Russian troops were present only in small sabotage-and-reconnaissance groups scattered among Ukrainian positions, and that neither side fully controlled the city — it was a contested gray zone .
• President Zelenskyy and the Ukrainian General Staff denied the capture on July 4, stating the city remained under Ukrainian control .
• CNN reported on July 16 that the slow, costly infiltration of Kostiantynivka showed the Kremlin's willingness to tolerate devastating casualties for even minimal tactical gains, and that the Russian claim was unsupported by battlefield reality .

Russia's own behavior undermined its claim: on July 4, Moscow offered a temporary ceasefire around the city to conduct a "humanitarian operation" to transfer the bodies of fallen soldiers — an offer that made little sense if the city was fully under Russian control .

July 18: Ukraine's Clearing Operation

On July 18, 2026, soldiers of the 425th Separate Assault Regiment "Skelya" conducted a sweep/clearing operation in Kostiantynivka and raised the Ukrainian flag over a building in the city center . The regiment released video footage on its social media accounts showing the operation and stated: "The town is under the control of the Armed Forces of Ukraine" .

The operation was widely covered by Interfax-Ukraine, UNN, Militarnyi, Euromaidan Press, Censor.NET, and the New Voice of Ukraine on July 18 . The video shows soldiers reporting: "Mr. President, Mr. Commander-in-Chief, I have the honor to report: The 425th 'Skelya' Regiment has completed its combat mission. The Ukrainian city of Kostiantynivka is once again flying the yellow-and-blue flag" .

The Information War: AI Accusations and Fake Flag Footage

The battle for Kostiantynivka was fought on the information front as intensely as on the ground:

Russia's use of AI-manipulated footage: ISW warned that the Russian Defense Ministry and affiliated sources were publishing large quantities of footage possibly manipulated with AI to support exaggerated claims, making independent verification difficult . In June 2026, ISW had already assessed that Russia was using AI-generated flag-raising videos to fake battlefield success near Kostiantynivka . Russian commanders also sent soldiers on high-risk "flag-planting" missions into contested areas to produce photo reports for command, a practice documented by Radio Svoboda on July 6 .

Russia's counter-claim about Ukraine: On July 18 itself, the Russian Defense Ministry and state media (TASS, Rossiyskaya Gazeta, Vzglyad) alleged that Ukraine's flag-raising video was AI-generated and fake, pointing to "unnatural" figure movements and flag behavior . This accusation came exclusively from Russian military sources. Independent reporting from CNN, Reuters, and ISW consistently found Ukraine's July 18 operation to be credible, supported by unit-level video evidence, and consistent with the pattern of limited Russian presence in the city .

Broader Context: Russia's Failed Spring-Summer 2026 Offensive

The Kostiantynivka episode occurred against a clear operational failure by Russia's broader 2026 campaign:

• ISW assessed on July 1, 2026 that Russia's spring-summer 2026 offensive — Moscow's declared main effort — "has failed to achieve operationally significant gains" .
• Russian forces seized just 30 square kilometers across all of Ukraine in June 2026, compared to 481 km² in June 2025 — a 16-fold slowdown — while suffering approximately 19 times higher casualties per kilometer of advance .
• Al Jazeera reported on July 3 that Russia's advance had effectively collapsed in Ukraine, with an estimated 40,000 troops killed in June alone. At the current rate, Putin's forces would need 14 years to capture the remaining 20% of Donetsk Oblast .
• The offensive was stalled by Ukraine's Fortress Belt defensive line, Ukrainian mid-range strike campaigns against Russian logistics, and massive attrition to Russian manpower .

Bottom Line

Putin's July 3 claim of capturing Kostiantynivka was unsupported by evidence. The city remained a contested gray zone for two weeks, until Ukrainian forces from the 425th "Skelya" Regiment cleared it and raised the flag on July 18. The incident exemplifies the broader pattern of Russia's spring-summer 2026 offensive failing to produce meaningful operational gains despite enormous casualties — and a parallel information war where both sides use manipulated media, though Russian AI-generated flag footage was documented by ISW weeks before the Kremlin accused Ukraine of the same tactic.