510 confirmed by obituaries in the Ukrainian media, maybe twice that many MIA.
You can get an accurate tally from the Telegram Channel “Track a Nazi Merc”
A whole lot of dead mercenaries. Some did it for money, via the US taxpayer funded contracts, some did it because the CIA reprogrammed their fear/hate matrix to actually think it would be fun to fight Russian artillery with small arms, and some because they saw the Ukrainian propaganda commercials of models holding airsoft guns and they thought they’d get lucky.