Operation Cahaya

Operation Cahaya
	Part of Indonesian occupation of East Timor
Date	6 April – 31 December 1978
Location	Matebian, East Timor
Result	Indonesian victory;
Belligerents
Indonesia	FRETILIN
Commanders and leaders
Mohammad Jusuf	Nicolau dos Reis Lobato †; Alarico Fernandes
Units involved
ABRI Kostrad 744th Infantry Battalion; 700th Infantry Battalion; 401st Infantry Battalion; ; Kopassus Team-28; ; ;	FALINTIL
Strength
5 OV-10 Bronco; 3 F-5; 2 A-4 Skyhawk; 13 Battalions from Kostrad	Thousands of soldiers
Casualties and losses
Unknown	Hundreds of soldiers were killed
	Many civilians killed by the bombing

Operation Cahaya (lit. 'Light'; Indonesian: Operasi Cahaya) was a military operation launched by Indonesia with the objective of capturing several top leaders of Fretilin and attacking the group's main base on Mount Matebian. The operation is also regarded as the last major Indonesian offensive in East Timor following Operation Seroja and the Battle of Dili. It resulted in the ambush and assassination of Nicolau Lobato, the surrender of several Fretilin leaders, and the capture of the main base on Mount Matebian by Indonesian forces, marking the end of the Indonesian invasion of East Timor.