Category: American History
The United States entered World War I because Germany attacked U.S. civilian ships (unrestricted submarine warfare) and to support the Allied Powers (England, France, Italy, and Russia) against the Central Powers.
Germany's policy of sinking any ship — including neutral American merchant vessels — in the waters around Britain pushed the U.S. toward war. The infamous Zimmermann Telegram, in which Germany proposed a military alliance with Mexico, further inflamed American opinion.
The U.S. entered the war in 1917 under President Woodrow Wilson. American troops helped turn the tide, and the war ended in 1918 with an Allied victory.
Pick one: 'Because Germany attacked U.S. ships.'
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