USA HISTORY

Detailed explanation-1: -How long did WWII last? World War II lasted for six years, from 1939 to 1945.

Detailed explanation-2: -The Second World War took place between 1939 and 1945 and was the bloodiest conflict in human history. It split the world’s nations into two opposing military alliances.

Detailed explanation-3: -The major causes of World War II were numerous. They include the impact of the Treaty of Versailles following WWI, the worldwide economic depression, failure of appeasement, the rise of militarism in Germany and Japan, and the failure of the League of Nations.