Ukrainian commanders have deployed their last few spare troops across the border into Russia.

Elements of at least two Ukrainian army brigades exploited a gap in the defenses around the village of Sudzha, in Kursk Oblast on the Russian side of Ukraine’s northern border.

Hundreds of Ukrainian troops from the 22nd and 88th Mechanized Brigades, supported by artillery, drones, and air defenses, have marched nearly 10 miles into southern Russia.

The Ukrainian forces routed local Russian forces and captured Sudzha along with several other villages.

The Ukrainian army has been on the defensive for a year and has struggled to mobilize sufficient manpower to hold off Russian assaults on the front line in eastern Ukraine.