Brunei–Malaysia border 1901 (ceded to the British North Borneo Company which subsequently transferred the territory to Sarawak in 1904). The treaty between the Sultanate and Britain in 1888, which resulted in Brunei becoming a British Protectorate, did not manage to halt the loss of territory. The annexation of the Baram, Trusan and Limbang areas resulted in the current borders of Brunei, with the Limbang annexation, which Brunei had continuously refused to recognise, fragmenting the Sultanate into two non-contiguous territories. Malaysia inherited these borders with Brunei when Sarawak, which had also become a British Protectorate in 1888 and subsequently a Crown Colony after
Brunei–Malaysia border at the 100 fathom isobath. In its 1979 territorial waters and continental shelf map, Malaysia claimed the area to be part of its continental shelf and depicted the Brunei-Malaysian border as running up to the 100 fathom isobath. Brunei did not recognise these assertions made by Malaysia. The Exchange of Letters signed on 16 March 2009 by the two countries provided for Malaysia's recognition of Brunei's territorial waters which it had earlier disputed. A joint committee is to determine the final maritime border between the two countries. See below for more on the dispute between the two countries. At its