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The immediate answer is that Japan attacked and then declared war on the United States. Two days later Germany declared war on the United States. Both of these countries had already developed a demonstrated history of atrocities committed on innocents in countries they attacked. Their intent was to defeat, subjugate, rule and enslave or murder inhabitants of the United States. If our country had not defended itself, they most probably would have done just that to everyone in the world.

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15y ago
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Q: What factors supported United States entry inyo world war 2?
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