I think its true, as they had to do the conference of jalta, but im not sure be ause as far as i know Roosevelt was neutral but churchill thought that stalin is a traiter and he cant be trusted and the same way stalin thought about churchill. Also Churchill thought that roosevelt might be a pro-russian so i dont know the right answer to that question but i hope these random information could help you
The threat of Nuclear warfare. The soviets trying to spread communism. I dont believe anyone really won this war because it has caused lasting tension between the U.S. and the Soviet Union now present day Russia
