Russia’s Defense Ministry claimed on 22 September 2026 that it had surrounded Dobropillia, but the Institute for the Study of War (ISW) found no evidence to support the announcement. Dobropillia is a small town in Donetsk Oblast, known as the "pearl of the Donbas" for its coal industry, which has helped make Ukraine's Fortress Belt cities, holding the region from Russians since 2014, per RBC Ukraine.

Ukraine’s Vivaldi counteroffensive in Donetsk Oblast broke the northern arm of Russia’s plan to surround the fortified cities. ISW says Moscow’s Dobropillia claim diverts attention from that setback and portrays Ukrainian defenses as collapsing during the 81st session of the UN General Assembly, held on 21-28 September. The institute says Russia is likely spreading such claims to support its push for Ukraine’s capitulation.

Meanwhile, Ukrainian officers say Russian assault groups are still trying to break through toward Dobropillia, but have made no major gains.

Russia’s encirclement claim clashes with Ukrainian battlefield reports

Russia’s Ministry of Defense has claimed its troops were advancing toward Oleksandrivka, a village northwest of Dobropillia, but published no map to support its account.

At the same time, Ukrainian military observer Kostyantyn Mashovets said Ukrainian troops still held positions south and northeast of the city, which the experts said was inconsistent with the claimed encirclement.

ISW reported that a Ukrainian artillery reconnaissance battalion chief of staff said on 22 September that Russia had made no major advances near Dobropillia. He said Russian commanders kept postponing deadlines because of heavy losses and a gap between their plans and battlefield conditions.

A Ukrainian battalion officer said Russian troops were still trying to slip through Ukrainian lines in small groups.

How Dobropillia fits Russia’s plan to surround the fortress belt

Dobropillia is a transport hub on the southwestern approach to Ukraine’s “fortress belt,” which includes Kostiantynivka, Druzhkivka, Kramatorsk, and Sloviansk. These cities have anchored Ukraine’s defense in Donetsk Oblast since 2022.

Ukraine’s Third Army Corps commander, Andrii Biletskyi, whose corps is conducting the Vivaldi counteroffensive north of Lyman, explained that Russian forces advancing through Dobropillia were meant to join another force coming from north of Lyman, behind the fortified cities, encircling them rather than attacking them head-on.

ISW had already assessed on 16 September that Vivaldi had made the two-sided plan infeasible. In its 22 September report, ISW said Russia’s false claim about Dobropillia partly aims to divert attention from those Ukrainian gains.

Russian assaults toward Dobropillia continue

The setback north of Lyman has not stopped Russia’s push toward Dobropillia. Ukrainian staff sergeant Dmytro Davydenko reported on 14 September a sharp increase in assault groups moving toward the city, sometimes more than his unit could engage. He said Ukrainian troops had mined, blocked, or destroyed the main approaches.

ISW reported that Russia was preparing armor and drone support for possible assaults using armored vehicles this fall. A Ukrainian battalion officer said fog might help Russia move that equipment, although Ukrainian reconnaissance and drones would make it difficult. He said Russian glide bombs continued to strike infrastructure in the area.

Ukraine's Vivaldi counteroffensive rolled back a Russian advance north of Lyman in Donetsk Oblast. However, Moscow shifted part of its forces south, Roman Pohorilyi, co-founder of the Ukrainian battlefield mapping project DeepState, told Radio NV. Russian troops are now infiltrating Mykolaivka, a key strongpoint on the approach to the fortress city of Sloviansk, Pohorilyi said.

The halted advance was one arm of Russia's plan to encircle Ukraine's Donetsk fortress belt—the fortified cities of Sloviansk, Kramatorsk, Druzhkivka, and Kostiantynivka. Pohorilyi warned that losing Mykolaivka would create serious problems for Sloviansk's defenders. Russia is still pressing toward Dobropillia on the belt's southwestern flank.

Pohorilyi said Russia formed a "claw" north of Lyman by exploiting Ukrainian brigades short of personnel and pushing small groups into their lines. Ukraine's Third Army Corps stabilized the area, built up forces, and counterattacked. The push "multiplied all [Russia's] previous efforts by zero," he said.

Russian forces had repeatedly tried to capture or bypass Lyman, Pohorilyi said. Russian groups still infiltrate the approaches to the city, although Ukrainian forces have stabilized the situation there.

The corps says Vivaldi's first two phases regained control of 125 square kilometers, including 50 that had been under Russian occupation. It reported liberating Shandryholove and Derylove, securing Drobysheve, and inflicting more than 3,000 Russian personnel losses. Those battlefield figures have not been independently verified.

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Pohorilyi noted that the area around Mykolaivka had, until recently, been under the responsibility of Ukraine's 11th Army Corps and is now under the Third Army Corps.

Ukrainian troops must now find and stop infiltrating Russian groups before they establish control, he said. Personnel shortages on the Lyman axis persist, although he said reinforcements are being distributed more evenly.

Operation Vivaldi and the wider fight for Donetsk's fortress belt

The Third Army Corps first disclosed Operation Vivaldi on 15 September after conducting the counteroffensive north of Lyman under information silence. Commander Andrii Biletskyi said the announced gains were only the first phase; the corps said its attacks had disrupted Russian supply routes.

A 60th Mechanized Brigade captain said Ukrainian units quietly assembled near Derylove and Drobysheve, then struck Russian drone launch sites at planned times so infantry could advance. The corps disclosed a second phase on 20 September.

Farther southwest, Dobropillia faces even heavier pressure, Pohorilyi said. Russia has concentrated large forces there and is pushing with relentless infantry across a wide front, backed by thousands of drones each month—reconnaissance, strike, FPV, and Lancets—with numbers still rising. Russian troops are moving on settlements south of Dobropillia to establish a strongpoint and push deeper into Donetsk Oblast.

The pressure is not new: Biletskyi said Ukrainian troops halted a Russian incursion there last year. After Moscow claimed on 22 September to have encircled the town, the Institute for the Study of War found no evidence to support the claim.