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
Indonesia–New Zealand relations Federation of Malaysia as a means of perpetuating British imperialism in Southeast Asia. Sukarno was also sympathetic to the Brunei People's Party's failed revolt in Brunei and was buoyed by the success of Indonesia's "confrontation" policy against Dutch New Guinea and the Philippines reviving its territorial claim to the Malaysian state of Sabah. Throughout the Indonesian-Malaysian Confrontation, Indonesia waged an undeclared border war against Malaysia and sent armed parties on cross-border operations into the East Malaysian states of Sarawak and Sabah, which bordered Indonesia's Kalimantan provinces. In September 1964, Indonesian extended its infiltration operations to peninsular Malaysia. New Zealand agreed