The 17th Brigade was an infantry brigade in the Australian Army. First raised in 1912 as a Militia formation to provide training under the compulsory training scheme, the brigade was later re-raised as part of the First Australian Imperial Force during World War I. Established in 1917 in the United Kingdom, it was broken up and disbanded without seeing action, and its personnel used as reinforcements for other formations. Reformed during World War II, it took part in fighting in Libya, Greece, Crete, Syria in 1941–1942. Following Japan's entry into the war, the Australian government pressed for the 6th Division's return, and the 17th Brigade was subsequently brought back from the Middle East, via Ceylon where they undertook defensive duties until July 1942. Following the brigade's return to Australia, it was deployed to New Guinea for two campaigns: the Salamaua–Lae campaign in 1943 and the Aitape–Wewak campaign in 1944–1945. After the war, the brigade was disbanded in January 1946. Today, its name is perpetuated by the 17th Sustainment Brigade, which was raised as a logistics formation in May 2006.

The 2/6th Battalion was an infantry battalion of the Australian Army that served during the Second World War. Raised in October 1939 as part of the all-volunteer Second Australian Imperial Force, the battalion formed part of the 6th Division and was among the first troops raised by Australia during the war. Departing Australia in early 1940, the 2/6th were deployed to the Middle East where in January 1941, it took part in the first action of the war by Australian ground forces, the Battle of Bardia, which was followed by further actions around Tobruk. Later, the 2/6th were dispatched to take part in the Battle of Greece, although they were evacuated after only a short involvement in the campaign. Some members of the battalion subsequently fought on Crete with a composite 17th Brigade battalion, and the battalion had to be re-formed in Palestine before being sent to Syria in 1941–42, where they formed part of the Allied occupation force that was established there in the aftermath of the Syria–Lebanon campaign.