To paraphrase Stalin.
Britain gave us time,
America gave us money,
The Soviet Union gave the blood.
The USA had about 400,000 military dead.
England about the same, along with 450,000 civilians.
The Soviets had about 10,000,000 or more military dead, and even more than that in civilian deaths. That is a lot of blood. Of course before and after the war, Stalin killed more than that with his various purges and starvation programs.