Russia-Ukraine War — 2026-04-14

Russia Expands Buffer Zone in Sumy Oblast, Controls Approximately 150 Square Kilometers

The DeepState OSINT project reported that Russian forces have seized approximately 150 square kilometers of territory in Sumy Oblast, establishing a branched defensive line along the state border. The North army group is preparing new bridgeheads and exploiting weak points in Ukrainian defenses, with recent advances including the settlement of Miropolske on April 10. The expansion fulfills Putin's December 2025 directive to establish buffer zones in Sumy and Kharkiv regions.

Analysis
The 150 km2 figure from DeepState provides the first quantified assessment of the Sumy buffer zone since Gerasimov's December 2025 directive, establishing a baseline for tracking progress against stated objectives. The branched defensive line construction suggests Moscow intends to hold this territory rather than use it as an expendable buffer. The pattern of exploiting weak points along the state border indicates Russia is pursuing opportunistic expansion rather than a concentrated thrust.

1 sources

Russia creating buffer zone along Sumy border – DeepState - Interfax-Ukraine