How did world war ll began in europe and early american involvement in the war?​

Еxplаnаtiоn is in a filе

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World War II began in Europe on September 1, 1939, when Germany invaded Poland. ... The war in the Pacific began on December 7/8, 1941, when Japan attacked the American naval base at Pearl Harbor and other American, Dutch, and British military installations throughout Asia.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

troy donahue,   i think.