The United States joined the Second World War in December 1941 as a response to the Japanese attack on Pearl Harbour.
1917
The US did enter World War 1, though not till 1917.
the us decided to enter world war because they want the resources of france, and they want to keep on ruling france.
No
Japan attacked the US Fleet at Pearl Harbor.
1941
1917
1917
1914
on decmber 8 1941
1917
1909 to 1944 The US entered World War 2 in December of 1941.
The United States declaration of war is from 6 April 1917.
The US did enter World War 1, though not till 1917.
1917
the us decided to enter world war because they want the resources of france, and they want to keep on ruling france.
1941