"This would be a horrible massacre, one not seen since World War II. God bless them all," U.S. President Donald Trump wrote.

Russian troops have regained control of more than 86% of the territory in Kursk Oblast captured by Kyiv, Valery Gerasimov, the chief of the General Staff of the Russian army, said on March 12, while Ukraine said it was ready to fight as long as needed.

Ukrainian troops are making a significant retreat in Russia's Kursk Oblast, particularly near the town of Sudzha, but are not entirely withdrawing from the Kursk front. Units that spoke to Ukrainska Pravda have confirmed they are being repositioned to positions on the Russian side of the border.