 The 73rd Battalion was mobilized in Montreal, with recruiting beginning on 3 September 1915, in Montreal and in parts of Eastern Ontario and Quebec.After initial training in Valcartier and wintering in Montreal, it was deemed ready for overseas in spring 1916.The Battalion embarked at Halifax, NS on 31 March 1916, aboard RMS ADRIATIC, disembarking in Liverpool on 9 April 1916, with a strength of 36 officers and 1033 other ranks.