the allied victory, even a country like Poland. That's understandable.
However, the claim of that USSR played the most important role in winning the war was based on Soviet propaganda at the end of the war. It was wrong then and it's wrong now.
When USSR entered the war in June 1941, USA started to support USSR in December 1941. Here are the numbers from Wiki and online sources (i can't remember):
"Lend-Lease provided the soviets with 400,000 jeeps, 12,000 armoured vehicles, 11,400 aircraft and 1.75 million tons of food (wiki) through three corridors. The arctic convoy, the pacific convoy, and the Persian convoy routes. It's estimated that 27% of the supplies came through the Persian route, which could sustain 60 front line divisions (http://www.history.army.mil/book...). Doing some simple calculations, we see that all supplies provided by the US could sustain 222 divisions of the Soviet Union over the four years of lend-lease.
By comparison, by late 1941 the soviets fielded 401 divisions (wiki). By the end of the war, there were 550 divisions (Mark L Urban, Soviet Land Power). So, lend-lease could have supplied between 40-55% of soviet forces at varying times in the war. Of course, not all the supplies were used for active forces, and a significant portion of food was diverted to relieve the siege of Leningrad (today St. Petersburg).
Still the huge tonnage of supplies sustained the massive soviet war effort and did play a substantial role in pushing back the Germans. Many of the vehicles were repurposed by the soviets as katusha missile launchers and transports for their forces streaming west.
Still, it is important to remember that while the allies provided a lot of supplies, the soviets provided most of the bodies (about 10 million military casualties). Its men and material that win wars. "
