What was the biggest mistake made during WWII?

[Borodog]

OS,

I find your assessment of Roosevelt's motivations lacking in light of his general character. Every political move he made in his life was calculated to expand and tighten his power, yet you assume that his maneuvering the United States into foreign wars was done out of some sense of nobility or justice? "Standing up to the bully"? Roosevelt was the bully, like Mussolini, Hitler, and Stalin with him, he was a tyrannical socialist dictator who needed foreign wars because he was killing capitalism (and hence prosperity) at home.