How did the treaty of versailles cause world war two?

The main reason is that the reparations on Germany were so heavy and strong. They lost a lot of their land.

Hitler wanted to get Germany's Lebensraum (living space) back.

All the other countries also thought that the reparations were very bad, blaming everything on Germany. So they weren't too bothered about Hitler taking land back, invading Austria and the Czech republic and Norway etc.