Key Facts
- Duration
- 27 May – 12 June 1965 (16 days)
- Australian casualties
- 0
- Number of ambushes
- 2
- Max penetration depth
- Up to 10,000 yards into Indonesian territory
- Units involved
- 3rd Battalion, Royal Australian Regiment (3 RAR)
Strategic Narrative Overview
The 3rd Battalion, Royal Australian Regiment executed two ambushes along the Sungei Koemba river in Kalimantan. The first, on 27 May 1965, was carried out by two platoons from B Company and inflicted significant Indonesian casualties. A fortnight later, on 12 June 1965, a platoon from C Company conducted a second ambush slightly downstream, again resulting in heavy Indonesian losses with no Australian casualties in either engagement.
01 / The Origins
The battle occurred within the context of the Indonesia–Malaysia confrontation (Konfrontasi), a political and military conflict in which Indonesia under President Sukarno opposed the formation of Malaysia. British-Commonwealth forces, operating from bases in Sarawak, conducted covert cross-border operations known as Operation Claret to disrupt Indonesian military activity in Kalimantan and prevent incursions into Malaysian territory.
03 / The Outcome
Both ambushes achieved their objectives without any Australian losses, inflicting heavy casualties on Indonesian forces. The operations contributed to the broader strategic goal of Operation Claret: keeping Indonesian units off balance and disrupting their resupply along the river. The wider Konfrontasi conflict ended in 1966 following a change in Indonesian government, with Malaysia's sovereignty ultimately affirmed.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.