 Blamey joined the Australian Army as a regular soldier in 1906 , and attended the Staff College at Quetta . During the First World War he participated in the landing at Anzac Cove on 25 April 1915 , and served as a staff officer in the Gallipoli Campaign , where he was mentioned in despatches for a daring raid behind enemy lines . He later served on the Western Front , where he distinguished himself in the planning for the Battle of Pozières . He rose to the rank of brigadier general , and served as chief of staff of the Australian Corps under Lieutenant General Sir John Monash , who credited him as a factor in the Corps ' success in the Battle of Hamel , the Battle of Amiens and the Battle of the Hindenburg Line . 
