Commissioned Second Lieutenant 3rd Battalion East Yorkshire Regiment (on Probation) 15 August 1914 , 3rd Battalion East Yorkshire Regiment (on Probation) confirmed in rank London Gazette 18 May 1915 , 3rd Battalion East Yorkshire Regiment to be Lieutenant dated 2 February 1915 , 3rd Battalion to Expeditionary Force 7 February 1916 , 1st Battalion Joined in the Field 24 February 1916 posted to D Coy