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History of Cambodia
From antiquity to the modern era — the historical eras, key events, and narrative that shaped Cambodia.
Overview
A gate of the Angkor Thom temple complex, circa A.D. 1200 THE KHMER PEOPLE were among the first in Southeast Asia to adopt religious ideas and political institutions from India and to establish centralized kingdoms encompassing large territories. The earliest known kingdom in the area, Funan, flourished from around the first to the sixth century A.D. It was succeeded by Chenla, which controlled large areas of modern Cambodia, Vietnam, Laos, and Thailand (known as Siam until 1939).
Historical Eras
The major periods of {country}’s history at a glance.
Funan & Chenla
100 – 802
The earliest Indianized kingdoms of mainland Southeast Asia emerged in the Mekong Delta region. Funan, a trading and agrarian state heavily influenced by Indian religion and statecraft, flourished from roughly the first to sixth century before being absorbed by its successor polity, Chenla, which expanded Khmer dominion across much of modern Cambodia, Laos, and Vietnam.
Angkor Empire
802 – 1431
Jayavarman II unified the Khmer realm in 802 and inaugurated the Angkor period, the zenith of Khmer civilization. At its height under Jayavarman VII (1181–ca. 1218), the empire controlled vast territories from its monumental capital at Angkor, producing masterworks of hydraulic engineering and temple architecture. Sustained Thai pressure, dynastic strife, and the collapse of the irrigation network led to the abandonment of Angkor after the Siamese sacked it in 1431.
Post-Angkor Decline
1431 – 1863
With Angkor lost, the Khmer court relocated southward toward the Mekong, and Cambodia was reduced to a buffer state contested by Siam and a expanding Vietnam. The Thai seized the capital Lovek in 1594, and by the late seventeenth century Vietnam had annexed the Mekong Delta, severing Cambodia from the sea. Centuries of territorial attrition left the kingdom politically fragmented and economically weakened.
French Protectorate
1863 – 1953
King Norodom signed a protectorate agreement with France in 1863, initiating nine decades of colonial rule that gradually stripped the monarchy of real authority. During World War II, Japanese occupation paradoxically fostered Khmer nationalist sentiment even while Vichy French administrators remained in place. King Norodom Sihanouk's sustained diplomatic campaign — his Royal Crusade for Independence — compelled France to transfer sovereignty, and full independence was declared in November 1953.
Sihanouk & War Years
1953 – 1975
Independent Cambodia navigated Cold War pressures under Sihanouk, who abdicated the throne in 1955 to dominate civilian politics and pursued a precarious neutrality. A US-backed coup in 1970 installed Lon Nol, drawing Cambodia fully into the Vietnam War and enabling the Khmer Rouge insurgency to grow. Years of US bombing and civil conflict devastated the countryside and set the stage for the Khmer Rouge's seizure of Phnom Penh in April 1975.
Khmer Rouge & Recovery
1975 – 1993
The Khmer Rouge regime evacuated cities, abolished currency, and executed perceived enemies in an agrarian revolution that killed an estimated 1.5 to 2 million people between 1975 and 1979. A Vietnamese invasion in late 1978 toppled the regime but sparked over a decade of civil war and international isolation. The 1991 Paris Peace Accords and UN-supervised elections in 1993 restored a constitutional monarchy and began Cambodia's halting transition toward stability.
Modern Cambodia
1993 – present
The restoration of the monarchy under King Sihanouk and subsequent coalition governments presided over gradual economic growth, though factional violence in 1997 briefly destabilized the country. The final Khmer Rouge elements surrendered in 1999, and UN-backed tribunals later prosecuted surviving leaders for crimes against humanity. Cambodia has since pursued integration into ASEAN and sustained development, even as concerns about democratic backsliding and single-party dominance persist.
Timeline Preview
The first 7 key events. View the full chronology on the timeline page.
1700
Viets conquer Mekong Delta.
Viets conquer Mekong Delta; weaker Khmer kingdom assumes roughly modern borders of Cambodia.
1834 – 1841
Viets attack and share increasing control over Khmers with Siam kingdom.
Viets attack and share increasing control over Khmers with Siam kingdom.
1863
Cambodia becomes a protectorate of France. French colonial rule lasts for 90 years.
Cambodia becomes a protectorate of France. French colonial rule lasts for 90 years.
1941 – 1945
Cambodia is occupied by Japan during World War II.
Cambodia is occupied by Japan during World War II.
1946
France re-imposes its protectorate.
France re-imposes its protectorate.
1953
Cambodia wins its independence from France.
Cambodia wins its independence from France. Under King Sihanouk, it becomes the Kingdom of Cambodia.
1965
Head of State Sihanouk breaks off relations with the US.
Head of State Sihanouk breaks off relations with the US and allows North Vietnamese guerrillas to set up bases in Cambodia in pursuance of their campaign against the US-backed government in South Vietnam.