The U.S entered WW1 on April 6, 1917
The United States entered the war in 1917 and joined the Allied/Entente Powers
The US did enter World War 1, though not till 1917.
Persia did NOT fight in World War 1.
1914
yes
Hitler was not in world war one, he was the leader of the Germans in world war two.
portugal started world war 1 in July 16,1761
in 1915
no
1941
1914
Yes, he did.
1918