Music
Sport
Film & TV
U.S. History
2024
Music
Sport
Film & TV
U.S. History
2024
On Sep 1, 1939, Germany invaded Poland in the free city of Danzig, which started World War II.
On Sep 1, 1939
Germany invaded Poland in the free city of Danzig, which started World War II.
Source
Read Next Historical Events
What Happened on Sep 1?
What Happened in 1939?