Answer:
The U.S. made its major contributions in terms of supplies, raw material, and money, starting in 1917. ... During the war the U.S. mobilized over 4 million military personnel and suffered 110,000 deaths, including around 45,000 who died due to the 1918 Spanish influenza outbreak (30,000 before they even reached France).
Explanation:
They slowed the productions of arms and as well got help from other allied country's
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I'm sorry if this isn't right but from what I learned it's the first one :)
