World War I was the cause for World War II
I believe that world war 1 led to world war 2. the main reason is the treaty of Versailles. the allies totally screwed Germany and were totally unfair.
The allies forbade Germany to have an army of more than 100,000 men, a fleet of more than 36 warships, submarines of any kind, and military air craft. They could not maintain fortifications or military installations within 50km of the Rhine land. And to all that Germany was required to pay large sums of money as reparations for damages that the allies had taken during the war.
The league of nations had the responsibility of keeping the peace, and although they did not admit Germany to the league for the first couple of years after the war, Germany was let in in 1926. The league had little power however, and much of this was that it failed to pass through the American system so America stayed out of the responsibility of keeping the peace in Europe. As further proof to the leagues weakness, an event that occurred in Manchuria that led Japan to attack, was merely overlooked as an ‘ok’ reason to attack and let Japan get away with it, and to further this, Japan didn't even care what the league had to say about their little attack.
The rise of Hitler brought its problems also. During the great depression Hitler said that the only way for his country to get out of the de...