SECDET was withdrawn in August 2011, with the firm Unity Resources Group becoming responsible for providing security for Australia's diplomatic presence in Iraq.

[1] SECDET III engaged and destroyed an insurgent mortar team that had been firing on the Coalition Headquarters in the Green Zone.

SECDET IV had a Vehicle Borne Improvised Explosive Device (VBIED) detonate across the street from their HQ during their tour.

SECDET V was involved in a VBIED attack on 25 October 2004,[2] just short of an International Zone checkpoint, with the patrol suffering four wounded in action and serious damage to an ASLAV-25.

SECDET V was also involved in two incidents in the northern city of Tall Afar on 8 and 10 December 2004, when 3 Troop, A Squadron of the 2nd Cavalry Regiment was ambushed by insurgents using small arms and rocket propelled grenades.