Final answer:
The United States and the Soviet Union were allies in WWII is false due to the ensuing Cold War and opposing ideologies.
Explanation:
False. The United States and the Soviet Union were allies during World War II, but their alliance soon gave way to the Cold War, with both countries becoming opposing blocs. Differences in ideologies, postwar plans, and the desire to establish governments friendly to their own interests led to strained relations between the former allies.
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