Russian troop build-up threatens city seen as key to seizing Ukraine’s Donbas

Russian Forces Advance in Kostyantynivka, Targeting Ukraine's Donbas Region

Russian troop build up threatens city - Kostyantynivka, a vital city in eastern Ukraine, now faces encirclement as Russian troops have moved into its outskirts. Ukrainian soldiers describe the city as being in a “grey zone,” where control is contested, according to reports from the BBC. A drone pilot stationed in the area, who asked to remain anonymous, told the BBC that Russian forces are operating behind Ukrainian lines, making it hard to repel their advances in urban settings.

A Strategic Gateway to Donbas

The city serves as a critical entry point for Russian forces aiming to capture the Donbas region. If Kostyantynivka falls, Russian troops could target Ukraine’s last strongholds in the east, including Kramatorsk and Sloviansk. This would bring them closer to achieving a major objective in the war: securing full control of Donbas.

Frontline Stalemate and Supply Line Disruption

For months, the war in Ukraine has stagnated along the front lines. Ukrainian commanders claim they’ve regained more territory this year than they’ve lost, disrupting Moscow’s supply routes between the Russian border and Crimea. Recently, Russian authorities in Crimea halted fuel sales to the public due to shortages, while Kyiv’s strikes on oil refineries in Russia and across the country have drawn attention to the conflict’s broader impact.

A Ukrainian officer from a unit operating in Kostyantynivka described the situation as a “major crisis.” While Russian forces claim to have encircled Ukrainian positions, Kyiv disputes this, with Brig Gen Oleksandr Bakulin, commander of Ukraine’s 19th Corps, stating that “the situation remains under control” and that “the enemy has no success.” However, he admitted approximately 130 Russian soldiers are still active within the city.

Drones and the Battle for Control

Kostyantynivka’s streets are a battleground for drone operators. Ukrainian crews struggle to counter Russian advances, as the enemy uses both artillery and aircraft to target their positions. The drone pilot noted that while their teams focus on Russian infantry, the enemy’s use of simpler systems allows them to operate freely. “We can’t dedicate enough time to tracking their pilots,” he explained. “They detect our locations and force us to retreat.”

Russian forces have adapted tactics similar to those used in Pokrovsk, surrounding the city and cutting off supply lines. Recent reports indicate they’ve captured villages west of Kostyantynivka, a move that may divert attention from Ukrainian attacks on Russian fuel infrastructure and Crimea’s supply routes. The Kremlin’s rapid push to seize the city suggests a strategic intent to maintain momentum in the region.

A Persistent Threat

The city’s dense buildings and summer foliage provide cover for combatants. Russian troops have exploited this, using low-cost Chinese drones to monitor Ukrainian movements. Despite the challenges, the Ukrainian officer acknowledged the slow pace of Russian progress: “They move 100 meters a day, sometimes crawling to reach the next building.” Yet, the threat of losing Kostyantynivka looms large, with both sides vying for dominance in this contested space.