At the end of the first world war, the treaty of Versailles was signed in between Germany and allied powers (France, England, Russia).
The major treaty of Versailles are Germany had to lose its overseas territories, 75% of its iron, 26% of its coal to France, Poland, Denmark, and Lithuania.
Demilitarization of Germany, Germany was forced to pay compensation amounting to $6 billion.
Allied powers occupied the resource-rich Rhineland.
Final Answer:
The three major treaties of Versailles are Germany getting demilitarized, Germany lost its most of its Territory, and resource-rich Rhineland being occupied by the Allied Army.