The 22nd Brigade was a brigade-sized infantry unit of the Australian Army. It was briefly raised in 1912 as a Militia formation providing training as part of the compulsory training scheme. Later, during World War II, the brigade was raised as part of the all volunteer Second Australian Imperial Force in April 1940. Assigned to the 8th Division, in early 1941 the brigade was deployed to British Malaya, where it formed part of the defensive garrison that was established there by the British, eventually establishing its headquarters in the Mersing–Endau area.

The 8th Division was an infantry division of the Australian Army, formed during World War II as part of the all-volunteer Second Australian Imperial Force. The 8th Division was raised from volunteers for overseas service from July 1940 onwards. Consisting of three infantry brigades, the intention had been to deploy the division to the Middle East to join the other Australian divisions, but as war with Japan loomed in 1941, the division was divided into four separate forces, which were deployed in different parts of the Asia-Pacific region. All of these formations were destroyed as fighting forces by the end of February 1942 during the fighting for Singapore, and in Rabaul, Ambon, and Timor. Most members of the division became prisoners of war, waiting until the war ended in late 1945 to be liberated. One in three died in captivity.