Indonesia–Malaysia border Indonesia–Malaysia border The border between the Southeast Asian countries of Indonesia and Malaysia consist of both a land border separating the two countries' territories on the island of Borneo as well as maritime boundaries along the length of the Straits of Malacca, in the South China Sea and in the Celebes Sea. The land boundary has a length of 2,019.5 km and stretches from Tanjung Datu at the northwestern corner of Borneo, through the highlands of the Borneo hinterland, to the Gulf of Sebatik and the Celebes Sea in the eastern side of the island. The boundary separates the Indonesian
Indonesia–New Zealand relations Federation of Malaysia as a means of perpetuating British imperialism in Southeast Asia. Sukarno was also sympathetic to the Brunei People's Party's failed revolt in Brunei and was buoyed by the success of Indonesia's "confrontation" policy against Dutch New Guinea and the Philippines reviving its territorial claim to the Malaysian state of Sabah. Throughout the Indonesian-Malaysian Confrontation, Indonesia waged an undeclared border war against Malaysia and sent armed parties on cross-border operations into the East Malaysian states of Sarawak and Sabah, which bordered Indonesia's Kalimantan provinces. In September 1964, Indonesian extended its infiltration operations to peninsular Malaysia. New Zealand agreed