 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 lẹnu iṣẹ ológun, wọn rán an lọ sí : Somme, Racquinghem, igi Polygon, Messines, Villers-Bretonneux ati Mont Saint-Quentin. Ní 1917, wọn fún Colley-Priest ní àmì ẹyẹ ológun. Atọka fun ami eye naa ṣe akiyesi pe o ṣe afihan: 