Complex sentence: In June 1966 the Regiment deployed on a 6-month tour-of-duty in the jungles of Borneo to take part in the Indonesian Confrontation--it had started in 1962 after an Indonesian-inspired rebellion took place in Brunei, which was successfully quelled.
Split into simpler sentences: In June 1966 the regiment deployed on a six-month tour-of-duty in the jungles of Borneo to take part in the Indonesian Confrontation. This had started in 1962 after an Indonesian-inspired rebellion took place in Brunei, which was successfully quelled.