Ukrainian troops fly a reconnaissance drone over Russian-occupied areas of the Donetsk region on September 21, 2025. Scott Peterson/Getty Images

Russia’s advance into Ukraine slowed by almost half in September, according to the monitoring group DeepState, with Moscow capturing its smallest amount of territory since May.

“The Russians managed to capture 259 square kilometers (100 square miles)” in September, DeepState, a Ukrainian open-source mapping site that charts the war’s front lines, said in a report released Wednesday.

“Last month, the enemy occupied 44% less territory than in August,” it said. “Over the course of the month, the Russians managed to occupy 0.04% of the country’s total area, bringing the total figure to 19.04%.”

On Wednesday, the Commander-in-Chief of Ukraine

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