The United States entered World War II after the Japanese attack on Pearl Harbour on 7th December 1941. The US declared war on the following day, 8th December 1941.
The us entered ww2 in 1941
on decmber 8 1941
1909 to 1944 The US entered World War 2 in December of 1941.
The United States declaration of war is from 6 April 1917.
depends on who us is
The US entered World War 1 on April 6, 1917. The war ended about one and a half years later.
the us decided to enter world war because they want the resources of france, and they want to keep on ruling france.
The U.S. Entered World War 1 in 1917.
The United States joined the Second World War in December 1941 as a response to the Japanese attack on Pearl Harbour.
They didn't enter the first world war
Sunday, December 7, 1941 - The day of the attack on pearl harbour
Germany declared war on the US. The US entered World War 2 because of the Pearl Harbor raid.