Kammala jumla mai zuwa: A cikin 1917 'yan tsaron Irish sun shiga cikin yakin Pilckem wanda ya fara a ranar 31 ga Yuli a lokacin Yaƙin Ypres na Uku. Har ila yau, 'yan tsaron Irish sun shiga cikin yakin Cambrai a wannan shekara. A shekara ta 1918, rundunar ta yi yaƙi da yawa a lokacin yakin basasa.
Yaƙin Somme na biyu, gami da Arras da Albert. Daga nan sai rundunar ta ci gaba da shiga cikin fadace-fadace da dama a lokacin hare-haren da Birtaniyya ta kai kan Hindenburg Line. A ranar 11 ga Nuwamba 1918 aka sanya hannu kan Yarjejeniyar Armistice tare da Jamus. 1st Battalion ya kasance a Maubeuge lokacin da aka sanya hannu kan Armistice.