Russia Ukraine war, page-233019

According to some estimates, Ukrainians have lost close to 4000 soldiers so far. A lot.

Kiev has had to pull forces from the Donbass front for its incursion into Russia

Ukrainian troops that invaded Russia's Kursk Region have taken heavy losses in men and Western-provided vehicles, the Financial Times (FT) has reported.
The attack that began last Tuesday involved units drawn from six Ukrainian frontline brigades, soldiers told the outlet. They also claimed to have caught the Russians by surprise, but quickly came under fire from drones and FAB glide bombs.

Ukraine taking heavy losses in Kursk FT (bignewsnetwork.com)