Germany invaded Poland, September 1, 1939
Germany.
In his speech on 30 Janaury 1939 Hitler said that if the Jews plunged the world into war again, they would be annihilated. (The Nazis claimed that the Jews had caused World War 1 - hence 'again').
1939
2 be plunged into the air
in 1939-1945
world war 2 begun on 1 September 1939 and ended in 1945
1939 and ended in 1945
It didn't start at 1939 as in time but the year it started on was in 1939.
1939
1939-1945 -
1939