 Embarking for the Western Front , the 12th Battalion joined the British Expeditionary Force upon arrival in France on 7 April 1916 . Eight days later , Whittle was promoted to lance sergeant . Posted to the Fleurbaix sector of France , the 12th Battalion was engaged in minor operations until July . During this time , Whittle was wounded on 18 June , suffering a gunshot wound to his right arm . Initially admitted to the 3rd Field Ambulance , the injury necessitated treatment in England and Whittle was transferred to the 1st Auxiliary Hospital , Harefield . He rejoined the 12th Battalion on 16 September following recuperation . 
