Autonomous Region of Bougainville: 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.
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.
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.
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. …