USA didn't have a lot of victims because You situated in separate continent. US contribution in fascism annihilation is to small. Before ww2 USSR and Germany had a Molotov-Ribbentrop pact (i'm sure that u don't know about it so gooogle it) so this war was like a surpise war for USSR; that's why ussr didn't have time to develop military enough. The USSR people managed to unite, Red Army was known as the bravest army, cuz of its "immortal" soldiers who never give up. Red army saved Moscow, then Belarus, Ukraine, Pribalt countries, Poland, Czechoslovakia, Hungary, Austria, Norway , even Germany itself - the bigger part of Europe. If it hadn't happened the whole Eurasia and Africa then Oceania would be occupied.
But what USA made? Ok(good things but not bigger than USSR contribution), they had some intervention in Europe in 1945, so they helped to capitulate Berlin but they nearly was fucked up by small island country - remember Perl-Harbour, Soloman island, New Guinea, Philippines etc, But finally INDEPENDENT USA ARMY KILLED FUC****G 100,000 CIVILIANS, 100,000 PEACEFUL PEOPLE, AND KEEP BE PROUD OF IT.
The main source of fascism was GERMANY, NOT JAPAN, Japan would be capitulated without USA easily.