The main circumstance that led to the signing of the Treaty of Versailles was World War I. The Treaty of Versailles officially ended World War I and blamed Germany for the war.
The Treaty of Versailles was signed on June 28, 1919, it was signed between the Allied powers and Germany. This is known to be the official end of World War I. President Woodrow Wilson is known for not wanting to be harsh on Germany, which was shown in his Fourteen Points. Even though he didn't want to be harsh on them, he could not say the same for other leaders.
The Treaty of Versailles ended up being extremely harsh on Germany and even made them take the blame for the entire war. Germany thought this was unfair, as they believed they had just as much to do with the war as anybody else. Not only did they have to take the blame, but they also had to pay billions of dollars in reparations, give up land, and size down their military. They could only have an army of 100,000 men, 6 battleships, and no submarines.
Along with all of this, the Treaty of Versailles is known for creating boiling hate within Germany and the German people. Many felt as if was completely unfair that Germany should be taking the full blame. The treaty is also a cause of World War II, as it raised tensions between countries and sparked hate within Germany.