World War 2
World War 1
US in WW2

What was the first battle of World War 2?



User Avatar
Wiki User

The first battle of World War II was the Battle of Westerplate in Poland that lasted seven days--1 September to 7 September 1939--as a result of the Allied Forces' declaration of war to Germany, Slovakia, and the Soviet Union due to their invasion of Poland. Hope that helps!
The first battle of world war 2 occured in Poland on September 1st 1939.