September 1939 to August 1945.
they said it would last 4 years
2 years
World War One started on 28th July 1914 and ended on 11th November 1918 - so it lasted roughly 4 years.World War Two was from 1939 to 1945 - so 6 years.
There has been no World war 3. So the answer is 0...
7 years
4 long years
4 years and 106 days.
The war lasted for 6 years
6 years
World War 1 lasted for about 4 years and 3 months. WW1 started in August of 1914 and ended in November of 1918, however, the last peace treaties were not signed until 1923.
10 years!
World War 1 went on for about 4 years.
The US was in the World War 2 from December 7/8th 1941 to August of 1945. They had to stay in Europe and Japan for many years after the war too.
Three.
27 years
World War 2 began on September 1, 1939 and ended on September 2, 1945. It lasted exactly six years and one day.