The British Military Administration (BMA) was the interim administrator of British Borneo between the end of the Second World War and the establishment of the Crown Colonies of Sarawak and North Borneo in 1946. Specifically, the entity lasted from 12 September 1945 to 1 July 1946. Labuan became the headquarters of BMA. The headquarters was mostly managed by the Australian Imperial Force (AIF). The area under this administration today comprises Labuan, Sabah, Sarawak, and Brunei. Sarawak was administered by Australians under British Borneo Civil Affairs Unit (BBCAU).

The Crown Colony of North Borneo was a Crown colony on the island of Borneo established in 1946 shortly after the dissolution of the British Military Administration. The Crown Colony of Labuan joined the new Crown Colony during its formation. It was succeeded as the state of Sabah through the formation of the Federation of Malaysia on 16 September 1963.