ww1 1916 ww2 1939
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NO it wasnt that long it was about 10-15 years when world war 2 started AFTER world on 1 . :)
World War 2 lasted longer, six years compared to the four years of World War 1.
20 years
WWII was longer, lasting six years compared to the four years of WW1.
World War I ended with the Treaty of Versailles on November 11, 1918. World War II is generally considered to have started on 1 September 1939. So a bit (two months and ten days) under 21 years.