how many months passed between the start of world war 2 and the United States entering the war?

Answer 1

World War II began on September 1, 1939, when Germany invaded Poland. The United States entered the war after the attack on Pearl Harbor on December 7, 1941.

To calculate the number of months that passed between these two dates:

1. From September 1, 1939, to September 1, 1941, is 24 months (2 years).
2. From September 1, 1941, to December 7, 1941, is an additional 3 months and 6 days.

Adding these together, the total time from the start of World War II to the U.S. entering the war is approximately 27 months.