Ukraine has lost more than 40% of the territory in Russia's Kursk region that it rapidly seized in a surprise incursion in August as Russian forces have mounted waves of counterassaults, a senior Ukrainian military source said.

Of the territory Ukraine captured in a surprise attack in Russia's Kursk oblast in August, it has already lost 40 percent again. An army source told the Reuters news agency. “At the maximum, we had control of 1,

Ukraine has lost over 40 percent of the territory in Russia's Kursk region that it rapidly seized in a surprise incursion in August as Russian forces have mounted waves of counterassaults, a senior Ukrainian military source has said.

The Kursk offensive was the first ground invasion of Russia by a foreign power since World War Two and caught Moscow unprepared.

Ukrainian President Volodymyr Zelensky said Russia has deployed nearly 50,000 troops to Kursk, the southern Russian region where Kyiv launched its surprise counteroffensive in the summer.

Ukraine has lost over 40% of the territory in Russia's Kursk region that it rapidly seized in a surprise incursion in August as Russian forces have mounted waves of counter-assaults, a senior Ukrainian military source said.

The Russians want to reclaim part of the Kursk region as soon as possible. They fear that if Donald Trump strives to freeze the conflict, the territory they lost will remain in Ukrainian hands. Even Putin's propaganda would struggle to justify that.