Invasion of Poland
Pearl Harbor bombing
bombing in pearl harbor
September 1939 is the month the historians use as the beginning of World War 2.
September 1, 1939 was the official beginning of World War 2.
France
FDR
1939
Neutral
The dropping of the Atomic Bombs was considered the beginning of the end of World War 2. It did motivate Emperor Hirohito to surrender.
German invasion of Poland
they wern't