4h 25min, apr 21, 1917 y - US joins the war
Description:
United States had discovered the plot formed by Germany to instigate war between Mexico and US. After much consideration and thought, the US declared war on Germany in April. The army grew from 107 000 in the start of 1917 to 1.3 million by August 1918.
Added to timeline:
World War I
History- 2017
Date: