apr 6, 1917 - United States officially enters World War One
Description:
A Senate vote of 82-2 passes the declaration of war against the Central Powers to the House which also passes by a vote of 373-50 officially bringing the United States of America into The Great War.
Source:
History, "America enters World War I"
(http://www.history.com/this-day-in-history/america-enters-world-war-i)
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