Lengkepan kalimah di handap ieu: Tanggal 13 Oktober 1939, Campbell ngagabung ka Angkatan Kakaisaran Australia Kadua (AIF), sarta dibéré nomer jasa AIF VX21. Manéhna mimitina ditugaskeun ka &lt;a href="2/1st%20Battalion%20%28Australia%29"&gt;2/1st Battalion&lt;/a&gt; salaku mayor, tapi jadi brigade mayor ti 16th Brigade dina poé anu sarua. Manéhna dijieun pendamping tina Distinguished Service Order pikeun bagian-Na dina
Patempuran Bardia. Kutipanana berbunyi: