did russia lose territory in Ukraine in September?

Thought for 10s

Yes, according to independent assessments, Russia suffered a net territorial loss in Ukraine in September 2026.⁠English.nv

The Institute for the Study of War (ISW), using geolocated evidence, assessed that Russian forces captured about 175.5 km² while Ukrainian forces liberated about 256.4 km², for a net Russian loss of roughly 81 km². When including areas of Russian infiltration (without full control), the net Russian loss was larger (around 175 km²).⁠Understandingwar

The Finnish OSINT group Black Bird Group estimated an even larger net reduction in Russian-controlled territory of about 190 km²—the biggest monthly net loss in their data since June 2023. Most of this was linked to Ukrainian counterattacks around Lyman and toward Komar in western Donetsk Oblast.⁠X

Context and caveats

These figures contrast sharply with Russian claims. Putin said Russian forces seized 1,301 km² in September; ISW described that claim as “so far from reality as to resemble hallucinations.”⁠English.nv

Much of the Ukrainian gains were tied to Operation Vivaldi in the Lyman area (northern Donetsk). Ukrainian commanders reported liberating on the order of 125–176 km² there. Some of those liberations likely occurred earlier in the summer and were only confirmed/mapped in September because of Ukrainian operational security. ISW and Black Bird Group both note this, so the pure “September fighting” net change is somewhat smaller or harder to pin down precisely, but the overall direction is still a net Russian loss.⁠Understandingwar

Broader 2026 context from ISW: Russian advances slowed sharply after March and have often been near zero or negative, while Ukraine has conducted successful counterattacks (including earlier ones in the Oleksandrivka direction). Russian monthly casualty figures were also high (Ukrainian General Staff reported over 46,000 in September).⁠Understandingwar

In short, independent trackers agree that Russia ended September with less territory under its control than it started with, driven mainly by Ukrainian gains near Lyman, even after accounting for limited Russian advances elsewhere. Official Russian numbers do not match the available evidence.

(http://www.autoadmit.com/thread.php?thread_id=5911416&forum_id=2#50181922)