Born in Ballarat, Victoria and a Butcher by trade, William John Braybrook was 25 years and single when enlisted on the 22nd of March 1917 in the Divisional Signal Company 3, Engineer Reinforcements 12, Australian Imperial Force, with the rank of Sapper, Number 18782. His Unit embarked from Melbourne, Victoria, on board HMAT A32 'Themistocles' on the 4th of August 1917. Sapper on the 21st of May 1917 to the 6th of June 1917 at the Signal School A.I.F.; Sapper at the Australian Corp Signal Coy, France. Returned to Australia per 'Takada' on the 7th of September 1919 and disembarked on the 7th of October 1919 with the Termination of Period of Enlistment. Tree No. 2944