How many years was the US involed in World War 2?

Answer 1

the us entered the war in 1941 after the Japanese bombed pearl harbor until the end of the war 1945.
The U.S. was in WWII from December 8, 1941 (when FDR signed the declaration of war against Japan, and 4 days later Germany declared war on the U.S.) until September 2, 1945 (when Japan signed the Japanese Instrument of Surrender on board the USS Missouri).

Answer 2

Although World War 2 started in 1939 the United States dis not enter it until December 7, 1941, when the Empire of Japan launched a surprise attack on Pearl Harbor. The war ended in 1945 (Germany: May 7, 1945, Japan:August 15, 1945) So the USA was (technically) in the last four years of the war.

Answer 3

December 1941 - August 1945. The US entered the war following Pearl Harbor and finished the war with the bombing of Hiroshima and Nagasaki.

Answer 4

they fought for 4 years December 7, 1941- 1945

Answer 5

America was in WW2 from December 1941 (Pearl Harbor attacks) to when the war ended, May 1945.

Answer 6

Almost four years.

Answer 7

1941 to 1945