Lably
Skip to content

Autonomous Region of Bougainville

Autonomous region of Papua New Guinea

  • 16 min read
  • 6 chapters

Explore on Lably

ToursExplore Lably’s 3D tours

In 2024, the region had a population of 367,093 people. The lingua franca of Bougainville is Tok Pisin, while a variety of Austronesian and non-Austronesian languages are also spoken. The region includes several Polynesian outliers where Polynesian languages are spoken. Geographically, the islands of Bougainville and Buka form part of the Solomon Islands archipelago, but they are politically separate from the independent country of Solomon Islands. Historically, Bougainville and Buka, together with the islands of Choiseul, Santa Isabel, the Shortlands, and Ontong Java, which are all now part of the country of Solomon Islands, formed the German Solomon Islands Protectorate, the geographical area later being referred to as the North Solomon Islands.

Bougainville has been inhabited by humans for at least 29,000 years. During the colonial period, the region was occupied and administered by the Germans, Australians and Japanese for various periods. The name of the region originates from French admiral Louis Antoine de Bougainville, who reached it in 1768.

Bougainvillean separatism dates to the 1960s, and the Republic of the North Solomons was declared shortly before the independence of Papua New Guinea in 1975; it was subsumed into Papua New Guinea the following year. Conflict over the Panguna mine became the primary trigger for the Bougainville Civil War (1988–1998), which resulted in the deaths of up to 20,000 people. A peace agreement resulted in the creation of the Autonomous Bougainville Government.

In late 2019, a non-binding independence referendum was held with 98% voting for independence rather than continued autonomy within Papua New Guinea. As a result, the regional authorities intend to become independent by 2027, pending ratification by the Papua New Guinean government. If ratified, the capital may relocate from Buka back to the previous location of Arawa. In March 2025, the Bougainville Independence Leaders Consultation Forum recommended 1 September 2027 as the date of independence, a date later revised in July 2026 to 1 September 2030.

History

Prehistory

Bougainville has been inhabited by humans for at least 29,000 years, according to evidence obtained from Kilu Cave on Buka Island. Until about 10,000 years ago, during the Last Glacial Maximum, there was a single island referred to as "Greater Bougainville" that spanned from the northern tip of Buka Island to the Nggela Islands north of Guadalcanal.

The first inhabitants of Bougainville were Australo-Melanesians who presumably arrived from the Bismarck Archipelago. Around 3000 years ago, Austronesian peoples brought the Lapita culture to the islands, introducing pottery, agriculture, and domesticated animals such as pigs, dogs, and chickens. Both Austronesian and non-Austronesian languages are spoken on the islands to this day, however, there has been significant mixing between the populations to the point that cultural and genetic differences are no longer correlated with language.

Colonial history

The first Europeans to sight present-day Bougainville were the Dutch explorers Willem Schouten and Jacob Le Maire, who glimpsed Takuu Atoll and Nissan Island in 1616. British naval officer Philip Carteret saw Buka Island in 1767 and also visited the islands that were later named in his honour. In 1768, French admiral Louis Antoine de Bougainville sailed along the east coast of the island that now bears his name.

German administration

The German Empire, which had already begun operations in New Guinea, annexed present-day Bougainville in 1886, after agreeing with the United Kingdom to divide the Solomon Islands archipelago between them. A German protectorate over the northern islands was established later that year, but the British Solomon Islands Protectorate was not established until 1893. The initial boundary between the two territories was much more southerly, with Choiseul Island, Santa Isabel Island, Ontong Java, the Shortland Islands, and part of the Florida Islands included in the German section. The current boundary between Papua New Guinea and Solomon Islands is derived from the Tripartite Convention of 1899, which saw those islands ceded to the United Kingdom.

The German Solomon Islands were administered through German New Guinea, although it took almost two decades for an administrative presence to be established. The German administrative station at Kieta, established in 1905, was preceded by a Marist mission, which succeeded in converting a majority of the islanders to Catholicism. The first fully commercial plantation was established in 1908, but German annexation had little economic impact.

Australian administration

The Australian Naval and Military Expeditionary Force occupied Bougainville in December 1914, as part of the Australian occupation of German New Guinea. The 1919 Treaty of Versailles established the former colony as a League of Nations mandate, administered by Australia as the Territory of New Guinea. A civilian administration was established in 1920, after which German nationals were deported and their property expropriated. A number of punitive expeditions took place during both the German and Australian administrations, as part of "pacification" programs. The colonial period saw significant changes in the culture of the islanders.

In 1942, Bougainville was invaded by the Japanese in order to provide a support base for the operations elsewhere in the South-West Pacific. The Allied counter-invasion resulted in heavy casualties, beginning in 1943, with full control of the islands not re-established until 1945. After the war the Australian government incorporated Bougainville and the rest of the mandate into the Territory of Papua and New Guinea, the immediate predecessor of present-day Papua New Guinea.

Modern history

Papua New Guinea gained its independence from Australia in 1975. As Bougainville is rich in copper and gold, a large mine had been established at Panguna in the early 1970s by Bougainville Copper Limited, a subsidiary of Rio Tinto. Disputes by regional residents with the company over adverse environmental impacts, failure to share financial benefits, and negative social changes brought by the mine resulted in a local revival for a secessionist movement that had been dormant. Activists proclaimed the independence of Bougainville (Republic of North Solomons) in 1975 and in 1990, but both times central government forces suppressed the democratic independence movement.

Civil war

In 1988, the Bougainville Revolutionary Army (BRA) increased their activity significantly. Prime Minister Sir Rabbie Namaliu ordered the Papua New Guinea Defence Force (PNGDF) to put down the rebellion, and the conflict escalated into a civil war. The PNGDF retreated from permanent positions on Bougainville in 1990 but continued military action. The conflict involved pro-independence and loyalist Bougainvillean groups as well as the PNGDF. The war claimed an estimated 15,000 to 20,000 lives.

In 1996, Prime Minister Sir Julius Chan made the controversial move to hire Sandline International, a private military company previously involved in supplying mercenaries in the civil war in Sierra Leone, to put down the rebellion.

Peace agreement and autonomy

The Bougainville conflict ended in 1997 after negotiations brokered by New Zealand. In 2000, A peace agreement was completed and, together with disarmament, provided for the establishment of an Autonomous Bougainville Government. The parties agreed to have a referendum in the future on whether the island should become politically independent.

On 25 July 2005, rebel leader Francis Ona died after a short illness. A former surveyor with Bougainville Copper, Ona was a key figure in the secessionist conflict and had refused to formally join the island's peace process.

In 2015, Australia announced it would establish a diplomatic post in Bougainville for the first time. In 2016, it cancelled those plans acknowledging that it had not obtained the PNG government's approval.

Independence referendum

In 2019, a non-binding independence referendum was held with 98.3% voting for independence rather than continued autonomy within Papua New Guinea. As a result, the regional authorities intended to become independent between 2025 and 2027. A draft constitution for a "Republic of Bougainville" was published by the Autonomous Bougainville Government in May 2024. In March 2025, the Bougainville Independence Leaders Consultation Forum (BILCF) recommended 1 September 2027 as the date of independence. Prime Minister James Marape cautioned that Bougainville's economy is not sustainable enough for independence. In July 2026, the BILCF changed their recommended date of independence to 1 September 2030.

On August 6, 2026, the Joint Supervisory Body, the organ in which a delegation from the government of Papua New Guinea, led by Bougainville Affairs Minister Manasseh Makiba, has been negotiating with a delegation from the Autonomous Bougainville Government, led by Vice President and Attorney-General Ezekiel Masat, signed its final consultation documents which advocated for independence to be respected. Papua New Guinea's parliament then announced that it would be having debate on if the independence referendum should be respected on August 27. Shortly after, on August 11, Bougainville's president Ishmael Toroama warned the PNG parliament that the prospect of them rejecting the referendum was "unacceptable" and would be a "dangerous legal fiction", further stating that Bougainville's independence was "sealed in ink and blood", and reiterating that Bougainville would become independent regardless of parliament's opinion.

PNG's parliament began debating independence on August 27, however, 111 of the 118 MPs present could not come to a decision after the August 30 deadline as members of the opposition stated they only had a week to review the report by the Joint Supervisory Body.

Sign in to keep reading

5 more chapters are free with a Lably account.

More in Regions and countries

British ColumbiaProvince of CanadaKeralaState in southwestern IndiaMassachusettsU.S. stateVirginiaU.S. stateNative Americans in the United StatesIndigenous peoples of the United StatesKarnatakaState in southwestern India