World War I (jul 28, 1914 – 11h 11min, nov 11, 1918 y)
Description:
US entered 6 April 1917https://en.wikipedia.org/wiki/World_War_I
Added to timeline:
Date:
jul 28, 1914
11h 11min, nov 11, 1918 y
~ 4 years and 3 months