The 2/4th Armoured Regiment was an armoured regiment of the Australian Army, which served during World War II. The regiment was formed in November 1942 as part of the Second Australian Imperial Force by amalgamating a number of previously existing armoured units and was disbanded in September 1946 after seeing action in New Guinea and Bougainville Island, where it provided individual squadron-group sized elements which operated in support of infantry operations against the Japanese. During its service the regiment received 10 battle honours.

The 2/11th Armoured Car Regiment was an Australian Army armoured reconnaissance regiment of World War II. The regiment was formed in mid-1941 and was intended to be deployed to the Middle East. In late 1941, in response to the growing threat posed by Japan's entry into the war in the Pacific, it was employed in a defensive role to guard against a possible invasion of mainland Australia. It was disbanded in early 1944 without seeing action as part of the reduction of Australia's armoured forces and the reallocation of manpower to other formations more suited to jungle warfare.