The 16th 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. Its existence was short-lived, as it was disbanded after about six months, before it could be committed to the fighting on the Western Front. Raised again in 1939 for service during World War II, the brigade was deployed to the Middle East in early 1940 and subsequently saw action in the Western Desert and in Greece in 1941. In 1942, it returned to Australia in response to Japan's entry into the war, and later the brigade played a prominent role in the Kokoda Track campaign and at Buna–Gona in Papua. Withdrawn to Australia in early 1943, the 16th Brigade was re-organised and received many replacements from disbanding formations, but it was not recommitted to combat operations until late in the war. In 1944–1945, the brigade was committed to the Aitape–Wewak campaign in New Guinea. After the war, the brigade was disbanded in 1946. Today, its name is perpetuated by the 16th Aviation Brigade which was raised on 2 April 2002.

The Kokoda Track campaign or Kokoda Trail campaign was part of the Pacific War of World War II. The campaign consisted of a series of battles fought between July and November 1942 in what was then the Australian Territory of Papua. It was primarily a land battle, between the Japanese South Seas Detachment under Major General Tomitarō Horii and Australian and Papuan land forces under command of New Guinea Force. The Japanese objective was to seize Port Moresby by an overland advance from the north coast, following the Kokoda Track over the mountains of the Owen Stanley Range, as part of a strategy to isolate Australia from the United States.