Brunei–Malaysia border which are defined by agreements, from west to east, are as follows: Brunei and Malaysia in an Exchange of Letters on 16 March 2009, agreed to affirm the five agreements. The two countries also agreed to use the watershed principle to determine the remaining undelimited portions of the border. Brunei's maritime boundary with Malaysia until the 100 fathom isobath was inherited from the Sarawak (Definition of Boundaries) Order in Council 1958 No 1518 and the North Borneo (Definition of Boundaries) Order in Council 1958 No 1517, both of which defined the boundary between Brunei on the one hand, and Sarawak
British Forces Brunei the Brunei Revolt of 1962 and the Indonesia–Malaysia confrontation. Since Brunei's independence in 1984, forces have been stationed there at the request of the current Sultan, in a renewable agreement lasting five years at a time. The forces stationed in Brunei are available to assist the Sultan, but are also available for deployment overseas with other elements of the British Armed Forces if needed. As recompense, the Sultan pays to help support the British presence. BFB is located at Seria and is centred on a light infantry battalion, which will be one of the two battalions of the Royal Gurkha