<P> Major Indonesian empires such as Srivijaya and Majapahit were known to launch naval raids against neighbouring kingdoms . Bas reliefs from their period depict double outriggered ships, now called cadik . These reliefs show that some kingdoms developed navies and even armadas . </P> <P> These ancient kingdoms also developed martial arts for use in self - defence and warfare . They are collectively known today as pencak silat . </P> <P> Many inscriptions were found that mention Srivijayan activity in the 7th century . The Kedukan Bukit inscription is the oldest record of Indonesian military history, and noted a 7th - century Srivijaya n siddhayatra expedition led by Dapunta Hyang Sri Jayanasa . He was said to have brought 20,000 troops, including 200 seamen and 1,312 foot soldiers . The Telaga Batu inscription mentions military titles; such as senāpati (general), cātabhata (soldier), puhāvam (ship captain) and vāsīkarana (blacksmith / weapon maker). It revealed that the empire had specialised military units and formal military occupations . The Kota Kapur inscription mentions a Srivijayan naval expedition against Bhumi Java, and is dated to a period coinciding with the fall of the Tarumanagara and Kalingga kingdoms in Java . </P> <P> From the 7th to 9th century, Srivijaya was allied with the Sailendras of Central Java due to intermarriage . Srivijayan leader Maharaja Dharmasetu launched various naval raids against Cham ports in Indochina . The city of Indrapura by the Mekong River was temporarily controlled from Palembang in the early 8th century . The Srivijayans continued to dominate areas around present - day Cambodia until the Khmer King Jayavarman II, the founder of the Khmer Empire dynasty, severed the Srivijayan link later in the same century . </P>

When was the indonesian rule that constitutes a military occupation established