German opinion objected above all to a particular clause in the treaty that assigned all blame for starting the war to Germany. Thus, Germany was held responsible for all loss and damage that occurred in the war. What was this clause called?

The peace treaty that was signed at Versailles in June 1919, bringing World War One to its close, was inevitably a compromise.  None of the major signatory powers was very pleased with the settlement, and reactions in Germany were especially bitter, as she had not been allowed to take any part in the negotiations.