Born in Belfast, Ireland and a farmer by trade, Samuel Alexander was only 28 years and single when enlisted on 3 July 1918 in the 12th General (Victorian) Reinforcements, Australian Imperial Force, with the rank of Private, Number 61576, and was listed as Effective abroad (still overseas) and his Unit embarked from Melbourne, Victoria, on board HMAT A37 Barambah on 31 August 1918. His Unit from Nominal Roll was Australian Army Medical Corps. Marched into 14th Training Bn, Hurdcott, 14th of December 1918. Transfered to Australian Army Medical Corps Details, 10 January 1919, and marched into AAMC Training Depot, Fovant. Admitted to No 2 Group Clearing Hospital, 22 January 1919 (measles); discharged, and rejoined unit, 7 February 1919. Marched out for duty with No 4 Group Clearing Hospital, Codford, 17th of February 1919. Marched out to No 1 Australian General Hospital, Sutton Veny, 6 August 1919, and posted to 9th Field Ambulance. Granted leave, 14 January 1920, subject to recall. He was granted leave on 14th of January 1920 subject to recall and commenced return to Australia on board HT 'Friedrichsruh' on 22nd of January 1920; disembarked Melbourne on the 9th of March 1920 and was discharged on 1st of April 1920. Tree No: 3665