<prompt> Ramba uchiverenga ndima iyi - Callinan akapiwa basa rokuva lieutenant muCitizens Military Force muna June 1940, achizogadzwa kuva Royal Australian Engineers. Muna Kurume 1941, akazvipira kushanda mhiri kwemakungwa uye akabatana neChipiri cheAustralia Imperial Force, achitora chinzvimbo semurairidzi kuDemolitions Wing, pa7th Infantry Training Center. Akakwidziridzwa kuva kaputeni muna Chikunguru 1941, uye akazotumirwa semutevedzeri-mukuru ku a href22nd20Commando20Squadron2028Australia2922nd Independent Companya, achienda navo kuTimor  <response>: sorutivi rweSparrow Force muna December 1941. Iye gare gare akatungamirira macommando mukati mekurwisa kwavo pachitsuwa uye muna Chikunguru 1942 akasimudzirwa kwenguva pfupi kuva mukuru. 