Federation of North Borneo State Negara Kesatuan Kalimantan Utara
Flag
The territory of the proposed federation
Status	Proposed federation states
Capital	Brunei Town (de facto)
Recognised regional languages	Malay
Religion	Sunni Islam
Membership	Brunei Sarawak North Borneo
Government	Constitutional monarchy
• Sultan	Omar Ali Saifuddin III
• Prime Minister	A.M. Azahari
Historical era	Brunei revolt
• Established	1961
• Disestablished	1962
Currency	Malayan dollar

Part of the Formation of Malaysia
Events
Malaysia Bill Cobbold Commission  • 18-point agreement  • 20-point agreement Singaporean referendum Sarawak communist insurgency Piracy in the Sulu and Celebes Seas  • Cross border attacks in Sabah  • Moro conflict Brunei revolt  • North Borneo Federation Konfrontasi Manila Accord Maphilindo Sarawak Self-governance Malaysia Act 1963 North Borneo Self-governance Proclamation of Malaysia Operation Claret 1964 race riots in Singapore MacDonald House bombing PAP–UMNO relations Proclamation of Singapore UN Security Council Resolution 213 Singapore Agreement South Thailand insurgency Double Six Tragedy Pedra Branca dispute 2019 failed constitutional amendment 2021 constitutional amendment
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The North Borneo Federation, also known as North Kalimantan (Malay: Negara Kesatuan Kalimantan Utara, lit. 'Unitary State of North Kalimantan'), was a proposed political entity which would have comprised the British colonies of Sarawak, British North Borneo (now known as the Malaysian state of Sabah) and the protectorate of Brunei.

Attempts for the establishment

In 1956, the governments of Sarawak, North Borneo and the State of Brunei announced that they would abandon the Malayan dollar and adopt a common currency of their own,^[1] but that never came into being.

The idea of the North Kalimantan was proposed by Brunei's People Party President, A. M. Azahari, who had forged links with Sukarno's nationalist movement, together with Ahmad Zaidi, in Java in the 1940s. The idea supported and propagated the unification of all Borneo territories under British rule to form an independent leftist North Kalimantan state. Azahari personally favoured Brunei's independence and merging with British North Borneo and Sarawak to form the federation with the Sultan of Brunei as the constitutional monarch.

However, the Brunei People’s Party was in favour of joining Malaysia on the condition it was as the unified three territories of northern Borneo with their own Sultan, and hence was strong enough to resist domination by Malaya, Singapore, Malay administrators or Chinese merchants.^[2]

The North Borneo (or Kalimantan Utara) proposal was seen as a post-decolonisation alternative by local opposition against the Malaysia plan. Local opposition throughout the Borneo territories was primarily based on economic, political, historical and cultural differences between the Borneo states and Malaya, as well as the refusal to be subjected under peninsular political domination. Joining to form Malaysia was seen as a new form of colonialism under Malaya.

The basic concept behind the formation of a union of British Borneo was partly based upon the Federation of Rhodesia and Nyasaland in Southern Africa. After the defeat of the revolutionaries in the Brunei Revolt, the idea was put to rest. Had the federation been formed, the capital city would probably have been chosen from Kuching (capital of Sarawak), Jesselton (present-day Kota Kinabalu, capital of Sabah) or Bandar Brunei (present-day Bandar Seri Begawan, capital of Brunei and the historical capital of the region).

The Sultanate of Brunei has traditionally opposed such a federation. When it was first proposed during the 1960s the Sultan of Brunei favoured joining Malaysia, though, in the end, disagreements concerning the nature of such a federation, and also disputes over oil royalties stopped this from happening.

References