Kammala jumla mai zuwa: Rukunin Tsaro na 15 ya yi yaƙi a Yankin Yammacin Yamma, ya shiga cikin ƙaddamar da hare-haren Jamus wanda ya haifar da Babban Ƙungiyar Allied, ya yi yaƙi a Sedan a ƙarshen watan Agusta 1914. Ya yi yaƙi a Yaƙin Marne na Farko. Bayan haka, ya kasance a cikin layin a yankin Champagne kuma ya yi yaƙi a cikin
Yaƙin Champagne na biyu a watan Satumba zuwa Oktoba 1915. Ya yi yaƙi a Aisne har zuwa Satumba 1916, sannan ya shiga Yaƙin Somme. Babban aikinsa na gaba shi ne yakin Arras a cikin bazara na 1917. A watan Mayu 1917, an tura rukunin zuwa Gabas ta Gabas, inda ya yi tsayayya da Rasha Summer Offensive da aka sani da Kerensky Offensive. Ya kasance a Gabas ta Gabas har zuwa armistice a wannan gaba, sa'an nan kuma ya koma yammacin yamma, ya isa yankin Verdun a farkon Janairu 1918. Ya tafi yankin Flanders / Artois a watan Afrilu 1918 kuma ya kasance a wannan yanki har zuwa ƙarshen yaƙin. Ƙungiyar Allied Intelligence ta ba da rabuwa a matsayin na uku.