 Four were formed—lettered A, B, C and D like their British counterparts—and they took part in the Borneo campaign.Z Force, an Australian-British-New Zealand military intelligence commando unit, formed by the Australian Services Reconnaissance Department, also carried out many raiding and reconnaissance operations in the South West Pacific theatre, most notably Operation Jaywick, in which they destroyed tonnes of Japanese shipping at Singapore Harbour.An attempt to replicate this success, with Operation Rimau, resulted in the death of almost all those involved.