World War 2 began on September 1, 1939, when Germany invaded Poland. This invasion was the culmination of a series of aggressive actions by Germany in the years leading up to the war, including the remilitarization of the Rhineland in 1936, the annexation of Austria in 1938, and the occupation of Czechoslovakia in 1939.
Why did World War 2 start?
There are a number of factors that contributed to the outbreak of World War 2. These include:
* The rise of nationalism and militarism in Europe. After the end of World War 1, many European countries were left in a state of economic and political turmoil. This led to the rise of nationalist movements that advocated for the expansion of their countries' territories and the reassertion of their national pride. At the same time, many countries began to build up their militaries in preparation for a future war.
* The Treaty of Versailles. The Treaty of Versailles was the peace treaty that ended World War 1. It was seen by many Germans as being too harsh, as it required Germany to give up territory and pay reparations to the Allied Powers. This resentment of the treaty helped to fuel the rise of Nazism in Germany.
* The Great Depression. The Great Depression was a global economic crisis that began in 1929. It caused widespread unemployment and poverty in Europe, which led to further political instability.
* The failure of the League of Nations. The League of Nations was an international organization that was created after World War 1 to promote peace and cooperation between nations. However, the League was unable to prevent the outbreak of World War 2.
The combination of these factors created a perfect storm that led to the outbreak of World War 2. The war was one of the most destructive conflicts in human history, resulting in the deaths of millions of people.