<prompt> Qedela umusho olandelayo: UCallinan wathunywa njengeluthenanthi eMbutho Wezempi Wezakhamuzi ngoJuni 1940, waqokwa waba yingxenye yeRoyal Australian Engineers. NgoMashi 1941, wavolontiya ukuyosebenza phesheya kwezilwandle futhi wajoyina i-Second Australian Imperial Force, wathatha isikhundla sokuba ngumfundisi e-Demolitions Wing, eSikhungweni Sokuqeqeshwa Kwezempi Se-7th. Wakhushulwa waba ngukaputeni ngoJulayi 1941, futhi kamuva wathunyelwa njengomphathi wesibili ku- a href22nd20Commando20Squadron2028Australia2922nd Independent Companya, ethunyelwa nabo  <response>: I-Timor njengengxenye ye-Sparrow Force ngoDisemba 1941. Wabe esehola ama-commando ngesikhathi somkhankaso wabo esiqhingini futhi ngoJulayi 1942 wakhuthazwa okwesikhashana waba ngumphathi. 