The United States entered World War I due to

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The German policy of unrestricted submarine warfare was seen as a direct threat to American lives and interests, leading to the United States' entry into World War I. The sinking of the Lusitania, a British passenger ship, by a German U-boat in 1915 was a major catalyst for American public opinion to turn against Germany, and President Woodrow Wilson eventually declared war on Germany in 1917. Economic concerns and treaty obligations were also factors, but it was the German policy of unrestricted submarine warfare that ultimately pushed the United States into the war. Pressure from allies may have played a role, but was not the primary reason for US entry into World War I.

The United States Entered World War I Due to