Which event is generally considered to be the first belligerent act of World War II?

Question

Germany’s attack on Austria
Germany’s attack on Russia
Germany’s attack on Poland
Germany’s attack on Britain

Answer 1

The event that is generally considered to be the first belligerent act of World War II is Germany’s attack on Poland, which took place on September 1, 1939. This invasion prompted Britain and France to declare war on Germany, marking the official start of the conflict.