Casualties: KIA, MIA and WIA. The Russian numbers see a bit low. Where did you get them from? PS. It was the Russians to run out of people first, so whether it was a winning strategy is debatable.
I'm only talking about one year, not the whole thing. I think it was 1917. In 1918 Czar Nicholas II got sacked and they signed an armistice. Shortly after that a guy named Valdimir Lenin signed a peace treaty with the central powers to end the war.