Indonesia–Malaysia confrontation TNKU's objectives to destabilise the proposed Malaysian state. Following the TNKU's military setback in Brunei, on 20 January 1963 Indonesian Foreign Minister Subandrio announced that Indonesia would pursue a policy of "Konfrontasi" with Malaysia, reversing Indonesia's previous policy of compliance with the British proposal. This was followed by the first recorded infiltration of Indonesian forces on 12 April 1963 when a police station in Tebedu, Sarawak, was attacked. In 1961, the island of Borneo was divided into four separate states. Kalimantan, comprising four Indonesian provinces, was located in the south of the island. In the north, separated from Kalimantan by
Peninsular Malaysia Peninsular Malaysia Peninsular Malaysia also known as Malaya or West Malaysia, is the part of Malaysia which lies on the Malay Peninsula and surrounding islands. Its area is , which is nearly 40% of the total area of the country - - or slightly smaller than England and Java island. It shares a land border with Thailand in the north. To the south is the island of Singapore. Across the Strait of Malacca to the west lies the Sumatra Island (Indonesia) and across the South China Sea to the east lies the Natuna Islands (Indonesia). Peninsular Malaysia accounts for the