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BATTLE // April 27, 1965

Battle of Plaman Mapu

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Overview

The Battle of Plaman Mapu was one of the largest battles of the Indonesia-Malaysia Confrontation, a protracted undeclared war between Indonesia and a British-led Commonwealth of Nations over the creation of a new Malaysian state. The battle occurred as a result of an Indonesian effort to storm a British hilltop base at Plaman Mapu, on the border between the Malaysian state of Sarawak and Indonesia.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of Plaman Mapu stands as one of the largest engagements of the Indonesia–Malaysia Confrontation, the undeclared war Indonesia waged against the British-led Commonwealth over the formation of Malaysia. The battle centered on an Indonesian assault against a British hilltop base at Plaman Mapu, situated on the border between Sarawak and Indonesia. As a border position, the base represented a forward Commonwealth presence in the contested frontier zone that defined much of the operational geography of the Confrontation. The Indonesian attempt to storm the position reflected the broader Indonesian strategic effort to challenge British and Commonwealth control along the Sarawak border during the conflict.

Commanders (1)

United Kingdom

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Last verified June 2026
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