Russia's last bridgehead west of the Oskil River is being strangled. In a new localized counterattack around Dvorichna, on the Kupiansk direction, Ukrainian forces spearheaded by Colombian volunteers have recaptured the village of Fyholivka and closed around what frontline reporting describes as Moscow's final stronghold west of the river — putting it, in effect, under siege from all sides.
Fyholivka recaptured, the noose tightens
The key to the latest advance is Fyholivka. The village sits on the road leading into Dvorichna from the north, and according to battlefield reporting its recapture gives Ukrainian and Colombian forces the positions they need to press the town from every direction at once.
The geometry of the fight now favors the attackers. Ukrainian and Colombian units have pushed into forested areas only about two kilometres from Dvorichna. That forward position does two things: it conceals the buildup of assault forces under tree cover, and it shortens the distance to the objective — cutting the warning time Russia's defenders have to react.
Behind the pocket, the Oskil River itself has become a trap. As the bridgehead shrinks, Russian logistics are forced across an increasingly narrow stretch of river and a handful of limited crossings — all of them under constant Ukrainian drone surveillance. Every attempt to resupply or reinforce the garrison risks being spotted and struck.
Zapadne: the blueprint for the siege
What is happening at Dvorichna follows a pattern set days earlier at Zapadne, southwest of the town, where Colombian and Ukrainian troops of the Khartia Corps completed the liberation of the settlement.
Before Zapadne itself could be cleared, Ukrainian forces first had to take the neighboring forest to the east. Earlier Ukrainian advances had already split the wider Russian Dvorichna bridgehead, leaving that forest exposed to pressure from two directions. Ukrainian drone operators went to work first: FPV drones hunted individual Russian soldiers and struck identified shelters, while heavy Vampire bomber drones dropped explosives onto hideouts, driving defenders out of protected positions and into exposed terrain. Footage from the operation showed Russian shelters burning after repeated strikes.
Only after the drones had dismantled Russia's ability to defend the forest did the Colombian assault troops move in on foot — crossing open fields, entering the treeline, and clearing it position by position. The remaining hideouts were located; their defenders were eliminated or captured. The Colombians then consolidated the forest, severing Zapadne completely from every nearby Russian position.
That is the doctrine on display: isolate a fortified pocket with layered drone interdiction, degrade it until it cannot fight back, and only then commit assault infantry. It avoids the costly frontal assaults that have defined so much of this war.
Why losing Dvorichna would hurt Moscow
The Dvorichna bridgehead mattered to Russia because it was a foothold west of the Oskil — a potential launchpad for a northern flanking move toward Kupiansk. Eliminating it does more than erase a few grid squares from the map: it removes that flanking threat entirely and secures the Oskil River as a stable defensive barrier for Ukraine.
For Moscow, the river that once protected the bridgehead is now its prison wall. Persistent aerial surveillance and precision strikes have turned the Oskil into a logistical choke point, severing crossing attempts and denying forward Russian elements both resupply and reinforcement. A river-backed bridgehead facing an integrated sensor-strike network is not an asset. It is a liability.
The pocket is shrinking
Dvorichna has not fallen yet. But the trajectory is unmistakable: the pocket keeps shrinking, the crossings are watched around the clock, and the assault force is dug in two kilometres out. If the Zapadne blueprint holds — drones first, infantry second, no way out — Russia's last stronghold west of the Oskil is living on borrowed time.
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