Ukraine's Third Army Corps completed Operation Vivaldi on October 14, 2026, after reclaiming 277 square kilometers and 16 settlements north of Lyman in Donetsk Oblast through phased counterattacks that liberated villages including Zelena Dolyna, Lypove, and Kolodiazi. These gains disrupted Russian efforts to outflank the Sloviansk-Kramatorsk defensive belt and forced redeployments from the Western grouping, including elements of the 1st Tank Army, easing pressure elsewhere along the line. Russian forces continue localized assaults toward Lyman but have made no verified advances into the city itself amid ongoing contested fighting. The Institute for the Study of War map, which governs related prediction market resolution on control of key points such as the railroad station, reflects Ukrainian territorial improvements in the sector. No scheduled diplomatic or military milestones are set to alter frontline momentum before year-end.