Ukrainian forces have conducted a sustained counteroffensive north of Lyman in Donetsk Oblast through Operation Vivaldi, reclaiming over 277 square kilometers and 16 settlements by mid-October 2026, including villages such as Zelena Dolyna and Kolodiazi. This has disrupted Russian efforts to advance toward the Sloviansk-Kramatorsk area and forced Russian redeployments of drone units to the sector. Fighting persists along the Zherebets River line with ongoing Russian attacks reported into late October. A localized ceasefire agreement in Oleshky takes effect October 27, while technical-level trilateral talks are scheduled for November. These battlefield shifts and diplomatic developments shape assessments of whether Russian forces can achieve a breakthrough to capture Lyman within any specified timeframe.