What was required by the Treaty of Versailles?

The treaty required Germany to disarm, make ample territorial concessions, and pay reparations to certain countries.  It did make peace for a short while.

Explanation:

Fun Fact: Although it is often referred to as the "Versailles Conference", the actual signing of the treaty took place at the historic palace, where the treaty got its name.

then its a law the end

they wanted the u.s. to fight on the side of the central powers.