Kalimantan Physical Revolution was series of conflict between Indonesian nationalist in Dutch Borneo following Japanese occupation of the Dutch East Indies and Proclamation of Indonesian Independence by Sukarno. After surrender of Japanese at the end of World War II, allied forces retake control of Dutch East Indies including Dutch Borneo from Japanese. Return of Dutch authorities however, rejected by majority of native population including in Borneo, later resulting in bloody conflict between Royal Netherlands East Indies Army and various armed militias and insurgencies across the archipelago. Allied military forces in Borneo was in safe position, being able to pacify most of nationalist uprising and impose a blockade to prevent military aid from Java and Sumatra and prevent nationalist t