Born in Ballarat and a carpenter by trade, William Gemmell Armour was 28 years and single when enlisted on the 25th of September 1916 in the 2nd Pioneer Battalion, Reinforcement 8, Australian Imperial Force, with the rank of Private, Number 3307. The Unit embarked from Melbourne, Victoria, on board HMAT A7 'Medic' on the 16th of December 1916, regiment number 3307A, rank of Private from the 4th Pioneer Battalion. Private marched in from Australia Sutton Mandiville Camp Details, England on the 18th of February 1917; marched in from Details Camp S Mandiville on the 24th of March 1917, Fovant; proceeding overseas to France to reinforce 4th Pioneer Battalion, Folkstone on the 9th of May 1917; Private re-allotted Regiment 3307A. Returned to Australia per 'Main' ex England on the 23rd of July 1919. Disembarked on the 11th of October 1919. Discharged from the 3rd Military District on the 18th of November 1919 with the termination of period of Enlistment. Tree No.2531