September 1964, the tension between Indonesia and Britain was high above the battle of 10 November 1945 Surabaya.
This is not triggered by the confrontation between Indonesia and British Commonwealth in Southeast Asia, Malaysia.
Moreover, the British also considered the inauguration of Dwikora on May 3, 1963 by Soekarno and infiltration of Indonesian guerrillas to North Kalimantan when it is a sign of war.
Do not want to stay silent, on August 27, 1964 England then perform 'Show of Force' by paying the ship HMS Victorious Parent escorted two destroyer ships from Singapore to Australia through the Sunda strait without permission.
This action then made the Minister of Foreign Affairs of Indonesia at that time, Soebandrio mencak angry because the action 'Slonong Boy' did not excuse the British fleet in the Sunda strait.
The Indonesian side also sees this as a lure action for the Air Force or ALRI to attack the British fleet and be the British reason to fight with Indonesia, just like the Gulf of Tonkin Vietnam incident.