
During the Second World War, Allied logistics in Papua played a crucial role in bringing the Kokoda Track campaign to a successful conclusion. "The great problem of warfare in the Pacific", General Douglas MacArthur declared, "is to move forces into contact and maintain them. Victory is dependent upon solution to the logistic problem."

ANGAU Hospital is a major hospital in Lae, Papua New Guinea. Named after an Australian Army unit that was responsible for the civil administration of the Territory of Papua and the Mandated Territory of New Guinea, the hospital provides in-patient and specialist medical services to people in the Sepik, Madang and Morobe provinces. In 2013–14, the Australian government announced that it would contribute to the hospital's redevelopment as part of a deal with the PNG government relating to the resettlement of asylum seekers.

The MV Anshun was a 3,188 GRT motor vessel built by Scotts Shipbuilding and Engineering Company Limited, Greenock in 1930 for The China Navigation Company for the Chinese coastal passenger service.

The Australian New Guinea Administrative Unit (ANGAU) was a civil administration of Territory of Papua and the Mandated Territory of New Guinea formed on 21 March 1942 during World War II. The civil administration of both Papua and the Mandated Territory of New Guinea were replaced by an Australian Army military government and came under the control of ANGAU from February 1942 until the end of World War II.

The Action off Bougainville was a naval and air engagement on the South Pacific Theater of World War II near Bougainville, Papua New Guinea on 20 February 1942. A United States Navy aircraft carrier task force on its way to raid the Imperial Japanese military base at Rabaul, New Britain was attacked by a force of land-based bombers of the Imperial Japanese Navy. The US task force was commanded by Admiral Wilson Brown and the Japanese aircraft forces were under the command of Eiji Gotō.

Between 9 March and 5 April 1942 during World War II, forces of the Empire of Japan occupied the islands of Buka and Bougainville in the South Pacific. At that time these islands were part of the Australian-administered Territory of New Guinea. A platoon of Australian commandos from the 1st Independent Company was located at Buka Airfield when the Japanese landed but did not contest the invasion.

The Invasion of Buna–Gona, called Operation RI by the Japanese, was a military operation by Imperial Japanese forces to occupy the Buna–Gona area in the Territory of Papua during the Pacific campaign of the Second World War. The initial landings and advance on Kokoda occurred between 21 and 27 July 1942. The Japanese invaded and occupied the location in preparation for an overland attack on Port Moresby along the Kokoda Track. The landing marked the start of the Kokoda Track campaign. The landings were not directly opposed by land forces but were engaged by elements of Maroubra Force as they advanced on Kokoda. This initially included B Company of the 39th Battalion, patrols of the Papuan Infantry Battalion (PIB) operating in the area and a small number of the Australian New Guinea Administrative Unit (ANGAU) that became attached to the force. The Australians were initially repulsed near Oivi but subsequently regrouped to defend Kokoda in an initial battle there from 28–29 July.

The Battle of Buna–Gona was part of the New Guinea campaign in the Pacific Theatre during World War II. It followed the conclusion of the Kokoda Track campaign and lasted from 16 November 1942 until 22 January 1943. The battle was fought by Australian and United States forces against the Japanese beachheads at Buna, Sanananda and Gona. From these, the Japanese had launched an overland attack on Port Moresby. In light of developments in the Solomon Islands campaign, Japanese forces approaching Port Moresby were ordered to withdraw to and secure these bases on the northern coast. Australian forces maintained contact as the Japanese conducted a well-ordered rearguard action. The Allied objective was to eject the Japanese forces from these positions and deny them their further use. The Japanese forces were skillful, well prepared and resolute in their defence. They had developed a strong network of well-concealed defences.

The First Battle of Eora Creek – Templeton's Crossing was fought from 31 August 1942 to 5 September 1942. Forming part of the Kokoda Track campaign of the Second World War, the battle involved military forces from Australia, supported by the United States, fighting against Japanese troops from Major General Tomitaro Horii's South Seas Detachment who had landed in Papua in mid-1942, with the intent of capturing Port Moresby. The battle was one of three defensive actions fought by the Australians along the Kokoda Track. The fighting resulted in the delay of the Japanese advance south, which allowed the Australians to withdraw to Efogi. Eora Creek village and Templeton's Crossing was subsequently the site of a battle in late October 1942 as the Australian forces pursued the Japanese forces retiring back toward the north coast of Papua.

The Second Battle of Eora Creek – Templeton's Crossing was fought from 11 to 28 October 1942. Forming part of the Kokoda Track campaign of the Second World War, the battle involved military forces from Australia, supported by the United States, fighting against Japanese troops from Major General Tomitaro Horii's South Seas Detachment who had landed in Papua in mid-1942, with the intent of capturing Port Moresby.

The Battle of Goodenough Island, also known as Operation Drake, was a battle of the Pacific campaign of World War II. The Allies landed on Goodenough Island, Papua, and clashed with a Japanese Kaigun Rikusentai. The Japanese troops had been stranded on the island during the Battle of Milne Bay in late August 1942. "Drake Force", consisting of the Australian 2/12th Battalion and attachments, landed on the southern tip of Goodenough Island at Mud Bay and Taleba Bay on 22 October, tasked with denying the Japanese use of the island prior to the Buna campaign. Following a short but intense fight, the Japanese forces withdrew to Fergusson Island on 27 October. After the battle, Goodenough Island was developed into a major Allied base for operations later in the war.

The Invasion of Salamaua–Lae, called Operation SR by the Japanese, was an operation by Imperial Japanese forces to occupy the Salamaua–Lae area in the Territory of New Guinea during the Pacific campaign of World War II. The Japanese invaded and occupied the location in order to construct an airfield and establish a base to cover and support the advance of Japanese forces into the eastern New Guinea and Coral Sea areas. The small Australian garrison in the area withdrew as the Japanese landed and did not contest the invasion.

The Battle of Ioribaiwa took place between 14 and 16 September 1942, during the Kokoda Track campaign of the Second World War. Involving forces from Australia, the United States, and Japan, the fighting centred on a high feature known as Ioribaiwa Ridge, south of Ofi Creek on the Kokoda Track, in the Territory of Papua. It was the last of three defensive battles fought by the Australians along the Kokoda Track to halt the Japanese advance from the north coast of Papua towards Port Moresby.

The Battle of Isurava took place over the period 26 to 31 August 1942. Forming part of the Kokoda Track campaign of the Second World War, the battle involved military forces from Australia, supported by the United States, fighting against Japanese troops from Major General Tomitaro Horii's South Seas Detachment who had landed around Buna and Gona in Papua mid-July 1942, with the intent of capturing Port Moresby to the south via the overland route.

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.

The Battle of Kokoda consisted of two engagements fought in late July – early August 1942. Forming part of the Kokoda Track campaign of the Second World War, the battle involved military forces from Australia, supported by the United States, fighting against Japanese troops from Major General Tomitaro Horii's South Seas Detachment who had landed around Buna and Gona in Papua mid-July 1942, with the intent of capturing Port Moresby to the south via the overland route.

The Battle of Milne Bay, also known as Operation RE or the Battle of Rabi (ラビの戦い) by the Japanese, was a battle of the Pacific campaign of World War II. Japanese naval infantry troops, known as Kaigun Tokubetsu Rikusentai, with two small tanks attacked the Allied airfields at Milne Bay that had been established on the eastern tip of New Guinea. Due to poor intelligence work, the Japanese miscalculated the size of the predominantly Australian garrison and, believing that the airfields were defended by only two or three companies, initially landed a force roughly equivalent in size to one battalion on 25 August 1942. The Allies, forewarned by intelligence from Ultra, had heavily reinforced the garrison.

The Battle of Mission Ridge – Brigade Hill took place between 6 and 9 September 1942, during the Kokoda Track campaign of the Second World War. Involving forces from Australia, the United States, and Japan, the fighting centred on a high feature south of the village of Efogi on the Kokoda Track.

The New Guinea campaign of the Pacific War lasted from January 1942 until the end of the war in August 1945. During the initial phase in early 1942, the Empire of Japan invaded the Australian-administered Mandated Territory of New Guinea and the Australian Territory of Papua and overran western New Guinea, which was a part of the Netherlands East Indies. During the second phase, lasting from late 1942 until the Japanese surrender, the Allies—consisting primarily of Australian forces—cleared the Japanese first from Papua, then the Mandate and finally from the Dutch colony.

The Battle of Oivi–Gorari was the final major battle of the Kokoda Track campaign before the Battle of Buna–Gona. Following the capture of Kokoda by Australian forces on 2 November, the Allies began flying in fresh supplies of ammunition and food to ease the supply problems that had slowed their advance north after the climactic battle around Ioribaiwa, which coupled with reverses elsewhere, had stopped the Japanese advance on Port Moresby.

The Battle of Port Moresby was an aerial battle fought between the Royal Australian Air Force (RAAF) and United States Army Air Force (USAAF) on one side and the Imperial Japanese Army and Imperial Japanese Navy on the other between 3 February 1942 and 17 August 1943 over Port Moresby, Papua. At the start, the defenders consisted only of Australian Army anti-aircraft batteries and machine-guns, but by late March had been strengthened by the arrival of Kittyhawk fighters from No. 75 Squadron RAAF. However, in just nine days they lost 11 aircraft and only the arrival of replacements enabled the unit to maintain ten serviceable machines.

The Battle of Rabaul, also known by the Japanese as Operation R, was fought on the island of New Britain in the Australian Territory of New Guinea, in January and February 1942. It was a strategically significant defeat of Allied forces by Japan in the Pacific campaign of World War II, with the Japanese invasion force quickly overwhelming the small Australian garrison, the majority of which was either killed or captured. Hostilities on the neighbouring island of New Ireland are usually considered to be part of the same battle. Rabaul was significant because of its proximity to the Japanese territory of the Caroline Islands, site of a major Imperial Japanese Navy base on Truk.