Before Angkor
The Khmer were not the first major power in the region. In the early centuries CE, the kingdom known from Chinese sources as Funan was centred in the Mekong delta and had trading ports such as Oc Eo. Its successor states, which Chinese writers called Chenla, are less clear, and historians disagree about whether Chenla was a single kingdom or several rival polities. Inscriptions in Sanskrit and Old Khmer from the sixth to eighth centuries show kings and courts in what is now Cambodia, with Hindu and Buddhist traditions already present. The Funan kingdom is a useful reminder that the Khmer state grew from an older network of trading and farming communities, and was not created from nothing.
Jayavarman II and 802
The traditional starting point of the Khmer Empire is the year 802, when Jayavarman II held a ceremony on the Kulen hills (Phnom Kulen) which inaugurated him as a universal ruler. The main source is a later inscription, from 1052, found at Sdok Kak Thom in modern Thailand. It describes a ritual that freed the land from the authority of “Java” and set up a cult of kingship. What “Java” means is debated, and scholars have suggested it may refer to Java in Indonesia or to a different place.
The ceremony is often described as the beginning of the cult of the devaraja, usually translated as god-king, though the exact nature of this cult is still debated. Jayavarman II is thought to have moved his seat between several places, and later settled at Hariharalaya, near present-day Roluos. What is certain is that his reign was remembered as the foundation of the Angkorian state.
Building the heartland: ninth to eleventh centuries
Over the next two centuries, the Khmer kings strengthened their rule and built the first great monuments.
- Indravarman I (reigned from about 877) built the Indratataka reservoir and the temple of Bakong, linking water works and temple building in a pattern later kings repeated.
- Yasovarman I (about 889 to about 910) founded Yasodharapura, the first city at Angkor, centred on Phnom Bakheng, and built the East Baray.
- A short period around 921 to 944 saw the court at Koh Ker under Jayavarman IV, before the capital returned to the Angkor area.
- Suryavarman I (reigned from 1002 to about 1050) expanded the kingdom to the west, into central Thailand, and started the West Baray.
These dates are approximate, drawn from inscriptions, and some succession disputes are poorly known. The kingdom was a collection of provinces held together by the king’s personal authority, regional governors, temple foundations and religious ties, and succession was often contested.
The twelfth century: Suryavarman II and the shock of 1177
Suryavarman II (reigned about 1113 to about 1150) is best known for building Angkor Wat. He campaigned against the Cham kingdom and Dai Viet, with mixed results. The kingdom was at that time one of the strongest in the region, but the expansion was costly.
In 1177, the Cham, from what is now central Vietnam, sailed up the Mekong and the Tonle Sap and captured the capital. This event was a serious blow to Khmer prestige. A Khmer prince who became Jayavarman VII organised resistance, defeated the Cham, and was crowned around 1181.
The peak under Jayavarman VII
Jayavarman VII (reigned from about 1181 to about 1218) is often seen as the high point of Khmer power, although it was also a period of great strain. He drove out the Cham and, according to inscriptions, extended Khmer control over large areas of what are now Cambodia, Thailand, Laos and southern Vietnam. The precise borders are uncertain, since control was not uniform, and the kingdom included tributary regions and areas of loose influence.
His building programme was enormous: Angkor Thom and the Bayon, Ta Prohm and Preah Khan, reservoirs, roads and rest houses, and a network of hospitals mentioned in inscriptions. He promoted Mahayana Buddhism while keeping Hindu traditions. Some historians suggest the scale of these projects placed a heavy burden on the population, though the evidence for this is indirect.
Contraction: thirteenth to fifteenth centuries
After Jayavarman VII, the kingdom entered a long period of change. The following reigns saw a Hindu revival, and the later spread of Theravada Buddhism changed the religious basis of kingship. Tai-speaking peoples to the west gained power, and the kingdom of Sukhothai and later Ayutthaya, founded around 1351, put pressure on Khmer territory. Dai Viet and Champa also remained neighbours with their own ambitions.
The Chinese diplomat Zhou Daguan, who stayed at Angkor in 1296 and 1297, wrote a detailed account of the court, markets, farming and customs. His description shows a prosperous society in the late thirteenth century, so the idea of a sudden collapse after Jayavarman VII is not supported. Instead, the decline was gradual. Trade routes shifted as maritime commerce, linked to monsoon trade winds, grew in importance, and the court gradually moved away from Angkor. The traditional date for the end of Angkor as capital is 1431, associated with an Ayutthayan attack.
After Angkor
The Khmer state did not end. Its kings ruled from places near Phnom Penh, then Longvek and Oudong, and the Cambodian monarchy continued into the modern era, though often under pressure from Siam and Vietnam, and later as a French protectorate. The Khmer language and culture continued, and modern Cambodia traces its identity to this history.
Reading the history with care
Because inscriptions are the main source, and most are royal or temple records, the political history of the Khmer Empire is told largely from the viewpoint of kings and priests. Dates are approximate, boundaries uncertain, and terms such as empire are modern labels, not Khmer ones. Compared with other regional Asian kingdoms, the Khmer left an unusually large body of stone inscriptions, but they still leave many gaps about everyday politics, warfare and succession. Historians rely on cautious interpretation, and new archaeological evidence continues to adjust the picture.