>The treatee from Versailles after WWI is what caused WWII.

Allow me to say, this is quite naive. Some of the measures adopted in that treaty, and the way they were implemented, were among the causes of increasing friction with Germany and the raise of national socialism that led to WWII. As tempting as it may be to simplify everything down to "Versailles treaty caused WWII", reality is obviously slightly more complex than that.