Indonesia–Malaysia relations of Malaysia, Singapore, and Brunei. The diplomatic relations between the Republic of Indonesia and Federation of Malaya were established promptly after Malaya's independence from Britain in 1957. However, the relations between the two nations deteriorated under Indonesian President Sukarno in 1962 (see Indonesia–Malaysia confrontation, see Indonesian withdrawal from the United Nations). The conflict resulted from Indonesian opposition to the formation of Malaysia, a merger of the Federation of Malaya with two former British colonies on Borneo: Sarawak and Sabah. The conflict has led to the termination of diplomatic relations on 17 September 1963. After the fall of Sukarno, relations between
Indonesia–Malaysia border the assertion that the islands belonged to Malaysia and both countries brought the dispute to the International Court of Justice. In 2002, the court decided that the sovereignty of the two islands belonged to Malaysia. The court however did not determine the maritime boundary in the surrounding waters and specifically decided that the 4° 10' North parallel which marked the easternmost portion of the Indonesia-Malaysia land border in Sebatik island did not extend to sea to form either the territorial sea or continental shelf border. The birth of the Indonesia–Malaysia border, or at least the portion for what is today