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Brunei , officially the State of Brunei Darussalam or the Nation of Brunei, the Abode of Peace (Malay: Negara Brunei Darussalam, Jawi: بروني دارالسلام), is a country located on the north coast of the island of Borneo, in Southeast Asia. Apart from its coastline with the South China Sea it is completely surrounded by the state of Sarawak, Malaysia, and in fact it is separated into two parts by Limbang, which is part of Sarawak.

Brunei, the remnant of a very powerful sultanate[citation needed], regained its independence from the United Kingdom on 1 January 1984 and is a member of the Commonwealth of Nations. During the early-20th century, the Southeast Asian nation experienced an economic boom and underwent rapid development. Economic growth during the 1970s and 1990s, averaging 56% from 1999 to 2008, has transformed Brunei Darussalam into a newly industrialised country. Brunei has one of the world's fastest growing Gross Domestic Product at Purchasing Power Parity. Brunei has the second highest Human Development Index among the South East Asia nations, after Singapore.

The power of the Sultanate of Brunei was at its peak from the fourteenth to the sixteenth centuries.[5] The Sultanate's suzerainty is thought to have extended over the coastal regions of modern-day Sarawak and Sabah, the Sulu archipelago, and the islands off the northwest tip of Borneo. European influence gradually brought an end to this regional power. Later, there was a brief war with Spain, in which Brunei's capital was occupied. Eventually the sultanate was victorious but lost territories to Spain. The decline of the Bruneian Empire culminated in the nineteenth century when Brunei lost much of its territory to the White Rajahs of Sarawak, resulting in its current small landmass and separation into two parts. Brunei was a British protectorate from 1888 to 1984, and occupied by Japan from 1941 to 1945 during World War II.

There was a small rebellion against the monarchy during the 1960s, which was suppressed with help from the United Kingdom. This event became known as the Brunei Revolt and was partly responsible for the failure to create the North Borneo Federation. The rebellion partially affected Brunei's decision to opt out of the Malaysian Federation.