General Staff: 28,850 Russian troops killed since Feb. 24.

Ukraine’s Armed Forces reported on May 21 that Russia has also lost 1,278 tanks, 3,116 armored personnel carriers, 2,178 vehicles and fuel tanks, 596 artillery systems, 201 multiple launch rocket systems, 93 anti-aircraft defense systems, 169 helicopters, 204 aircraft, 462 UAVs, and 13 boats.