Final answer:
The U.S. entry into World War II strategically aided the Allied powers by supplying military resources and troops to combat Axis powers effectively.
Explanation:
The United States' entrance into World War II affected the Allied powers strategically by providing significant military supplies and troops, bolstering their efforts in both theaters of the war. With the addition of American forces, particularly after the U.S. declaration of war in December 1941, the Allies could rely on increased manpower and resources to combat Axis powers more effectively. This assistance contributed to tilting the balance in favor of the Allies and played a crucial role in the eventual defeat of Germany and Japan.
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