Russian military deaths in WWI were about a third of what they had in WWII. It is hard to be specific, as it ended up in a revolution with the Soviet Union being created. The Soviet Afghan war, which was part of what ended the Soviet Union had significantly lower causalities then that.
WW2, Korea, Vietnam, both Iraq Wars, and Afghanistan - plus a few smaller conflicts
Unfortunately, Russia’s metric for horrific losses is the USSR in WWII, so they’ve got millions of bodies to go before it’s time for second thoughts.
Russian military deaths in WWI were about a third of what they had in WWII. It is hard to be specific, as it ended up in a revolution with the Soviet Union being created. The Soviet Afghan war, which was part of what ended the Soviet Union had significantly lower causalities then that.