Source
Part VIII. (Articles 231–247) Reparations
Article 231
The Allied and Associated Governments affirm and Germany accepts the responsibility of Germany and her allies for causing all the loss and damage to which the Allied and Associated Governments and their nationals have been subjected as a consequence of the war imposed upon them by the aggression of Germany and her allies.
Source: Treaty of Peace between the Allied and Associated Powers and Germany and Protocol. Signed at Versailles, June 28, 1919. Available online at: https://en.wikisource.org/wiki/Treaty_of_Versailles