SNIP
During the Siege of Leningrad, almost a million Soviet military and civilians died. Schwartzman's mother died there.
Yes, that was an interesting question we were asked when I was studying Russian/Soviet history: what if Stalin hadn't allied with Hitler at the start of the war, would Russia have suffered as much? There were two very different answers, as far as I remember, depending on whether Hitler decided to go East or West first.
I'm boring.
Stalin did not enter the war in alliance with Hitler.
Hitler had already decided to go West. And he needed neutrality from the USSR,. Thanks to the position of Britain (well, Poland) who refused the union with the USSR, he got it.
An interesting question is what would have happened if the USSR had not been neutral, but had attacked Germany first in 1939. The pan-European crusade against Bolshevism, which Czechoslovakia was threatened with in 1938, would not have begun.
Sorry, I couldn't resist.