This was signed on the 11th day of the 11th month at the 11th hour and ended the fighting of World War 1?

At 5 am, in a railroad-car outside Compiegne, France the Germans signed an Armistice Agreement with the allied forces that led to the ending of hostilities a cease fire, so ending the War. This took place at the eleventh hour of the eleventh day of the eleventh month.

The Peace Treaty that officially ended World War 1 was called the Treaty of Versailles. It was signed at the Palace of Versailles on 28th June 1919.