How did the Treaty of Versailles cause WW1 (DBQ)

it was signed after WWI so it didnt start it.

if you mean how did it start WWII thats because the treaty was very harsh when it came to Germany and basically blamed them for the whole thing because they lost.

Explanation:

they feared an attack from the allied forces.

The Treaty of Versailles was the treaty that brought WWI to an end. It was signed on June 28, 1919 in Versailles, five years after the assassination of Archduke Franz Ferdinand.

One of the most controversial provisions in the treaty was the "War Guilt Clause" which required Germany to accept responsibility for the loss and damage of the war, and pay reparations.