Indonesia–Malaysia confrontation become self-governing in 1959). In May 1961, the UK and Malayan governments proposed a larger federation called Malaysia, encompassing the states of Malaya, North Borneo, Sarawak, Brunei, and Singapore. Initially, Indonesia was mildly supportive of the proposed Malaysia, although the PKI (Partai Komunis Indonesia — Indonesian Communist Party) was strongly opposed to it. In Brunei, it was unclear whether the Sultan Omar Ali Saifuddien III would support Brunei joining the proposed Malaysian state because of the implied reduction of his political office, and Brunei's oil revenues ensured Brunei's financial viability were it to choose independence. Furthermore, a Brunei politician, Dr.
Indonesia–Malaysia border the incident. All detainees were released by 17 August 2010 but the incident unleashed a wave of anti-Malaysia sentiments in Indonesia. Both Indonesia and Malaysia agreed that the maritime border between the two countries in the area has not been determined. Indonesia claimed that it was ready to begin negotiations to determine the border but said that the Malaysians, which relies on its 1979 territorial waters and continental shelf limit map as the basis for its claim in the area, were not ready as they wanted to settle its maritime border with Singapore adjacent to the area first following the