Final answer:
FDR and Winston Churchill agreed to the Atlantic Charter in August 1941, committing the United States to war, establishing the basis for the allied strategy, and advocating for the Four Freedoms.
Step-by-step explanation:
FDR and Winston Churchill agreed to the Atlantic Charter in August 1941, prior to the American entry to the war. The Atlantic Charter committed the United States to war and laid the foundation for the allied strategy against Germany and Japan. It also expressed the shared commitments to peace, democracy, and the Four Freedoms, which became the rationale for later foreign interventionism.
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