On President Franklin D. Roosevelt's recommendation, the US Congress declared war on Japan on December 8, 1941, following the Japanese attack on the US fleet at Pearl Harbor, Hawaii. Because of their treaty with Japan, Germany declared war on the US on December 11.
The US had been directly and indirectly aiding Britain and Russia (against Germany) and China (against Japan).
Joseph Stalin was the leader of the Soviet Union when the United States entered World War 2.
Britain
normandy
As soon as the US entered the war in December 1941
US
Fdr
1941
Britain
Joseph Stalin was the leader of the Soviet Union when the United States entered World War 2.
Canada
France (including Free France) United Kingdom United States German
US entered to World War 2 because Japan attacked on Hawai islands which is the territory of US
1909 to 1944 The US entered World War 2 in December of 1941.
Britain
normandy
December 8, 1941
Enjoying life.