Indonesia–Malaysia confrontation Indonesia–Malaysia confrontation The Indonesian–Malaysian confrontation or Borneo confrontation (also known by its Indonesian/Malay name, Konfrontasi) was a violent conflict from 1963–66 that stemmed from Indonesia's opposition to the creation of Malaysia. The creation of Malaysia was the amalgamation of the Federation of Malaya (now West Malaysia), Singapore and the crown colony/British protectorates of North Borneo and Sarawak (collectively known as British Borneo, now East Malaysia) in September 1963. Important precursors to the conflict included Indonesia's policy of confrontation against Netherlands New Guinea from March–August 1962 and the Brunei Revolt in December 1962. The confrontation was an undeclared war with most
Brunei–Malaysia border and Sabah, Malaysia, on the other. All three territories were then ruled by Britain. The powers for the order in council were derived from the British Colonial Boundaries Act of 1895. Brunei and Malaysia still adhere to the British Orders in Council to define their territorial waters, where it was referred to in the Joint Statement made after the 18th Annual Leaders' Consultation between the Sultan of Brunei and Prime Minister of Malaysia on 3 November 2014 when reference was made to the Sarawak (Definition of Boundaries) Order in Council 1958 No 1518 as part of the boundary definition process