For some reason which is the subject of another topic, the formation of Malaysia was opposed by Indonesia and the Philippines. While the disapprobiation by the Philippines was expressed in non-violent but diplomatic ways affecting the diplomatic relations of two countries, the Indonesian led by President Sukarno who was very much under the influence of PKI (Communist Party of Indonesia) expressed it in the form of "konfrontasi" (condrontation) which in part violent means were used and all the hostile acts of diplomacy and propaganda thoroughly counfusing the Malay peoples of both countries. (Copied from article).