On 17 June 1968, to mark the 20th anniversary of their armed struggle against the Malaysian Government, the Communist Party of Malaya (CPM) launched an ambush against security forces in the area of Kroh–Betong road not far between Pengkalan Hulu town and Malaysia-Thailand border.
On 17 June 1968, to commemorate a major milestone in their armed struggle against the Malaysian Government, the Communist Party of Malaya (CPM) launched an ambush on security forces in the Kroh–Betong road area, close to Pengkalan Hulu town and the Malaysia-Thailand border.