Dee ihe ọzọ maka paragraf a - N'oge Agha Somme na Septemba 1916, Dalton so lụọ agha ọbara n'oge Agha Ginchy
, bụ́ nke gburu ma ọ bụ merụọ ihe karịrị ndị Ireland 4,000 ahụ́. Otu n'ime ndị ahụ nwụrụ bụ Tom Kettle, onye bụbu onye otu mba na-akwado ọchịchị na onye enyi nke nna Dalton na Emmet. E nyere Dalton ihe nrite Military Cross maka omume ọma ya n'agha ahụ. Mgbe nke ahụ gasịrị, a kpọfere ya na Battalion nke isii, Leinster Regiment, wee ziga ya na Salonika mgbe ahụ Palestine, ebe o duziri otu ụlọ ọrụ wee lezie ụlọ akwụkwọ sniper na El Arish. N'afọ 1918, a kpọghachiri Dalton ọzọ na France, na July a buliri ya n'ọkwa onye isi, na-eje ozi dị ka onye nkuzi.