Born in Sebastopol, Ballarat, Victoria and an Electrical fitter by trade, Robert McIntosh Calder was 22 years and single when enlisted on the 20th of January 1915 in the 7th Battalion, 3rd Reinforcement, Australian Imperial Force, with the rank of Private, Number 1669. His Unit embarked from Melbourne, Victoria, on board HMAT A54 'Runic' on the 19th of February 1915. Appointed signaller on the 14th of February 1915; promoted Gunner, France on the 15th of December 1915. Admitted to hospital gassed, England on the 4th of November 1917; Gunner wounded 2nd occasion gas, France on the 30th of November 1917. Gunner Embarked for England per HS Ville a Luge gassed from France on the 3rd of November 1917. Embarked for return to Australia per 'Berrima' ex England on the 2nd of January 1919. Discharged from the 3rd Military District on the 18th of April 1919 with the Termination of Period of Enlistment. Tree No. 3426