dec 7, 1916 - The USA Joins WW1 This was a defying moment in WW1 as America was a very powerful and strong country at the time with the best economy. With them joining the war it made it very difficult for the Triple Alliance to win the war.

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This was a defying moment in WW1 as America was a very powerful and strong country at the time with the best economy. With them joining the war it made it very difficult for the Triple Alliance to win the war.

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