Ukrainian forces have sustained momentum through Operation Vivaldi, a counteroffensive in northern Donetsk Oblast that produced net territorial gains in September and disrupted Russian attempts to encircle key defensive positions around Sloviansk and Kramatorsk. Reports indicate Ukrainian units have reclaimed settlements and pressured Russian logistics near Lyman, with mentions of advances or infiltrations toward contested areas including Terny. Russian sources acknowledge slowed progress and redeployments to stabilize lines, while independent assessments show Moscow recording more losses than gains in recent weeks. Sustained Ukrainian pressure, Western equipment flows, and Russian manpower constraints remain central variables, alongside any escalation or de-escalation signals that could alter frontline dynamics before resolution deadlines.