 Kọ itẹsiwaju fun paragirafi yii - Nigba ti a kede ogun, Awọn oṣiṣẹ ti Iṣakoso Irish di laifọwọyi awọn oṣiṣẹ ti II Army Corps ati ni ibamu pẹlu ibesile ti Ogun Agbaye akọkọ ni Oṣu Kẹjọ ọdun 1914, o ni igbega si brigadier gbogbogbo, ati gẹgẹbi apakan ti Agbara Iṣilọ Gẹẹsi ni Ilu Faranse gba idiyele ti Adjutant ati Ẹka Quartermaster-Gbogbogbo lakoko ipadabọ ti 2nd Corps lẹhin Ogun ti Mons, si Paris ati lakoko Ogun ti Marne : ó ṣe tán. Ni arin Oṣu Kẹsan ọdun 1914, o rọ ọkan ninu awọn brigadiers ni ila ija bi olori ti 13th Brigade 5th Infantry Division ati lẹhinna paṣẹ fun 53rd Brigade 18th Infantry Division titi di Oṣu kejila ọdun 1915, nigbati a paṣẹ fun ile lati gba aṣẹ ti 16th Irish Division ni Blackburn. 