New Guinea Force was a military command unit for Australian, United States and native troops from the Territories of Papua and New Guinea serving in the New Guinea campaign during World War II. Formed in April 1942, when the Australian First Army was formed from the Australian I Corps after it returned from the Middle East, it was responsible for planning and directing all operations within the territory up until October 1944. General Headquarters Southwest Pacific Area Operational Instruction No.7 of 25 May 1942, issued by Commander-Allied-Forces, General Douglas MacArthur, placed all Australian and US Army, Air Force and Navy Forces in the Port Moresby Area under the control of New Guinea Force. Over the course of its existence, New Guinea Force was commanded by some of the Australian Army's most notable commanders, including Sydney Rowell, Sir Edmund Herring and Sir Leslie Morshead.

Major General Basil Moorhouse Morris, was an Australian Army officer. He served in both the First and Second World Wars. In 1942, he was the Australian military administrator at Port Moresby at the start of the Imperial Japanese advance along the Kokoda Track after the invasion of Buna-Gona and successfully delayed the Japanese advance until units of the Second Australian Imperial Force arrived.