Why was the US become invole in the war of 1940?

Answer 1

The USA DID NOT become involved in the war in Europe in 1940, because the USA did not ENTER the war until AFTER the Japanese attack on Hawaii in December of 1941. In fact the USA did not manage to send ground troops to the United Kingdon until the later part of 1942, and those troops did not see any actual combat action until the summer of 1943, in North Africa, then in Sicily and then in Italy.

The vast majority of the US forces that were sent to Europe were in action for less than a year, from the D-Day landings in June of 1944 to the end of the fighting in the European theatre of war, in April of 1945.

Jim Bunting. Toronto.

Answer

Hitler declared war on the USA 3 days after Pearl Harbour. Germany & Japan were allies. (1941, not 1940)

Answer 2

The US didn't enter WWII until 1941.