Ukrainian forces have disrupted Russian plans to encircle the Donetsk Oblast Fortress Belt, marking a strategic shift in the war, while Russia faces pressure to mobilize additional troops amid conflicting territorial gain reports.
Ukrainian counterattacks in late 2025 and 2026 have reversed the strategic initiative on the battlefield, according to assessments from Understandingwar and the Kyiv Post. These efforts have dismantled a critical Russian salient north of Lyman, a key component of Moscow’s plan to encircle Ukrainian forces in the Donetsk region. The Russian military, now struggling to maintain momentum, has reportedly demanded 800,000 additional troops from President Vladimir Putin, though analysts question its feasibility given Russia’s strained logistics and recruitment capacity.
Ukrainian Counterattacks Disrupt Russian Encirclement Plans
Ukrainian forces have successfully contested Russian advances along multiple fronts, including the Kupyansk, Oleksandrivka, and Lyman directions, according to Understandingwar. This marks the first time since the August 2024 Kursk Offensive that Kyiv has held Russian forces to near-zero net gains, with significant counterattacks pushing back Russian positions in the northern flank of the Donetsk Oblast. The elimination of the Russian salient north of Lyman has disrupted Moscow’s broader encirclement strategy, which aimed to isolate Ukrainian forces in the region through coordinated advances from the north and south.
The Russian military command will likely need to reassess its campaign designs for the southern and northern flanks of the Fortress Belt given the elimination of its salient north of Lyman,
reported the Kyiv Post, citing the Institute for the Study of War (ISW). Russian forces, however, have made limited gains in areas like Kostyantynivka and east of Slovyansk, though they face challenges maintaining momentum in these zones. The dynamic situation has prompted Russian generals to request additional troops, with some milbloggers acknowledging the difficulty of sustaining operations without reinforcements.
Conflicting Territorial Gain Reports Highlight War’s Uncertain Pace
Discrepancies in reported territorial gains underscore the complexity of assessing frontline movements. According to Russia Matters, data from Ukraine’s DeepState OSINT group showed Russian forces gaining 14 square miles of Ukrainian territory in the four weeks leading up to September 8, 2026, while the Institute for the Study of War (ISW) recorded a 75-square-mile gain. These conflicting figures reflect the challenges of real-time battlefield monitoring, with both sources noting that Ukrainian forces have regained control of areas like Dvorichna in recent days.
Over the past year, Russia has gained 886 square miles of Ukrainian territory, equivalent to more than half the size of Rhode Island, though this pace has slowed in recent months. Ukrainian forces, meanwhile, have maintained control of the Kursk and Belgorod regions, with no significant territorial shifts reported in these areas over the past week. The war’s territorial dynamics remain fluid, with both sides reporting gains and losses that often overlap in contested zones.
Russian Mobilization Pushes for Reinforcements, but Feasibility Remains Doubtful
The Russian General Staff likely wants to use the additional 800,000 troops to implement its offensive plans throughout the front rather than only in Donetsk,
the Kyiv Post wrote, citing ISW analysis. However, the exact scope of any mobilization remains unclear, with Putin’s decision likely influenced by the evolving battlefield situation. Ukrainian President Volodymyr Zelensky continues to support a future trilateral Ukrainian-Russian-US meeting and to suggest efforts to restart peace talks with Russia.
The war’s next critical phase will depend on whether Russia can execute a large-scale mobilization and how Ukrainian forces respond. With the Zherebets River now serving as a potential defensive line, the conflict’s trajectory could shift further in Kyiv’s favor if Ukrainian operations continue to disrupt Russian advances. For now, the front remains a battleground of shifting gains and strategic recalculations, with both sides vying for control of key regions in eastern Ukraine.
