1945
For the world Wars in 1916 it was WW1 and in 1940- 1945(?) it was WW2
WW2 ended in the year, 1945.
1939-1945
It ended in April, 1945.
December of 1941
Treaty of Versailles was broken by Hitler and that began WW2.
around the WW2
In the year 1978.
It was during WW2, but I don't have the exact date.
in 1939 at the start of ww2
It was invented during WW2 by Robert Goddard.