Pari gbolohun yii: Colley-Priest wọle si 8th Field Ambulance, apakan ti 8th Infantry Brigade ti Australian Imperial Force, ni 19 May 1915 o si wọ ọkọ oju omi HMAT Ascanius ni ọjọ 9 Kọkànlá Oṣù, ti o lọ si Egipti ati Western Front. Nígbà tó wà lẹ́nu iṣẹ́ ológun, wọ́n rán an lọ sí Somme, Racquinghem, Polygon Wood, Messines,
Villers-Bretonneux àti Mont Saint-Quentin. Ní 1917, wọ́n fún Colley-Priest ní àmì ẹ̀yẹ ológun. Atọka fun ami eye naa ṣe akiyesi pe o ṣe afihan: