Ukraine’s Operation Vivaldi counteroffensive in September and early October 2026 liberated 140–176 square kilometers around Lyman and east of Sloviansk-Kramatorsk, reversing Russian gains and disrupting attempts to threaten the fortress belt cities from the north. Russian Defense Ministry claims of capturing Viroliubivka (Verolyubovka) on September 18 remain unconfirmed by ISW maps or Ukrainian sources, with the village north of Kostyantynivka described as still under Ukrainian control amid contested positions and incremental Russian pressure on adjacent sectors. Russian milbloggers have acknowledged Ukrainian advances in nearby areas such as Ozerne and Pyskunivka, forcing defensive repositioning. Trader sentiment on capture timelines incorporates these battlefield reversals, Ukrainian reinforcement capacity along the Kramatorsk axis, and Russian force allocation in the wider Donetsk campaign.