Answer:
The Treaty of Versailles was the peace treaty that officially ended World War I. As part of the treaty, Germany was required to give up some of its territories, including Alsace-Lorraine, which was returned to France, and some of its colonies, which were distributed among the victorious powers. This loss of territory was seen as a punishment for Germany's role in starting the war, and was intended to weaken the country and prevent it from being able to launch another major conflict.