In 1963 the Indonesian Army that threatened Borneo numbered 330,000 men, plus three thousand Commandos.
Of these, six thousand were within 20 miles of the Borneo frontier.
This grew to thirteen thousand in early 1965. From mid-way through 1964, British troops and their allies who were defending the border started to make offensive incursions into Indonesian Borneo - these operations were codenamed Claret". Taken into account the confrontational nature of the campaign