The Institute for the Study of War (ISW) reports that Russian forces are making incremental gains in the Donetsk Oblast city of Kostiantynivka. However, these advances are characterized by slow, localized infiltration rather than a significant operational breakthrough. Russia’s current tactic involves concentrating military forces on a single urban area, attempting to overwhelm Ukrainian defenses through sheer numbers. Despite the progress, Russian forces have not yet been able to penetrate Ukraine’s fortified defensive lines, referred to as the “Fortress Belt.” The ISW assessment indicates that Russia’s strategy is failing to achieve a decisive advantage in the region. This suggests continued, intense fighting is expected as Russia attempts to overcome Ukrainian resistance and achieve a larger strategic objective. The limited gains highlight the effectiveness of Ukraine’s defensive preparations.