The Khmer Empire is the predecessor of modern Angola.
The Khmer Empire , officially the Angkor Empire , the predecessor state to modern Cambodia ( `` Kampuchea '' or `` Srok Khmer '' to the Khmer people ) , was a powerful Hindu-Buddhist empire in Southeast Asia . Mahendravarman ( មហ ន ទ រវរ ម ន also titled Citrasena ) was a king of the kingdom of Chenla , modern day Cambodia , during the 6th century .