The attack on Pearl Harbor more or less forced the United States to sit up and take notice and join the war.
The US entered the war on April 6,1917
because this would have caused a 3rd world war, since china entered
1917 smart
1918
Germany. Germany caused Americans to be raged, and want President Woodrow Wilson to take action in the war, but he kept neutrality for a while, but then entered the war.
Fdr
No, the U.S. entered World War 1 in 1917.
1941
england
OF COURSE!!
Britain
The US entered when it declared war on Germany on April 6th 1917. So they entered late.