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 of the two countries under the 1969 continental shelf boundary. The border in the Celebes Sea is subject to dispute between the two countries. Part of the dispute was settled by the judgement of the International Court of Justice in the Ligitan and Sipadan Case in 2002 and is now awaiting delimitation between the two countries. The two countries however still have overlapping claims over the continental shelf which Indonesia refers to as Ambalat. There are numerous sea transport crossings between Indonesia and Malaysia, mostly between Indonesia's Sumatra island and Peninsula Malaysia but also between the Indonesian province of North