Forces of the Thai kingdom of Ayudhya sacked Angkor in 1431, leaving the Khmers plagued by dynastic rivalries and continual warfare with the Thais for a century and a half. The Spanish and Portuguese, who had recently become active in the region, also played a part in these wars until resentment of their power led to the massacre of the Spanish garrison at Phnom Penh in 1599. A series of weak kings ruled from 1600 until the French arrived in 1863. After some gunboat diplomacy and the signing of a treaty of protectorate in 1863, the French went on to force King Norodom to sign another treaty, this time turning his country into a virtual colony in 1884.

Modern History
Following the arrival of the French, a relatively peaceful period followed (even the peasant uprising of 1916 was considered peaceful). In 1941 the French installed 19-year-old Prince Norodom Sihanouk on the Cambodian throne, on the assumption that he would prove suitably pliable. This turned out to be a major miscalculation as the years after 1945 were strife-torn, with the waning of French colonial power aided by the proximity of the Franco-Viet Minh War that raged in Vietnam and Laos. Cambodian independence was eventually proclaimed in 1953, the enigmatic King Sihanouk going on to dominate national politics for the next 15 years before being overthrown by the army.

In 1969 the United States carpet-bombed suspected communist base camps in Cambodia, killing thousands of civilians and dragging the country unwillingly into the US-Vietnam conflict. Sihanouk was overthrown in a military coup in March 1970 and his successor General Lon Nol moved closer to the Americans. Sihanouk forged an alliance with the Khmer Rouge communists and the small guerrilla force swelled to an army of thousands in a matter of weeks. American and south Vietnamese troops invaded the country to eradicate Vietnamese communist forces but were unsuccessful; they did manage, however, to push the Vietnamese and their Khmer Rouge allies further into the country’s interior. Savage fighting soon engulfed the entire country, with Phnom Penh falling to the Khmer Rouge in April 1975.

Over the next four years the Khmer Rouge, under Pol Pot’s leadership, systematically killed an estimated two million Cambodians (targeting the educated in particular) in a brutal bid to turn Cambodia into a Maoist, peasant-dominated agrarian cooperative. Currency was abolished, postal services were halted, the population became a work force of slave labourers and the country was almost entirely cut off from the outside world. Responding to recurring armed incursions into their border provinces, Vietnam invaded Cambodia in 1978, forcing the Khmer Rouge to flee to the relative sanctuary of the jungles along the Thai border. From there, they conducted a guerrilla war against the Vietnamese-backed government throughout the late 1970s and ’80s.

In mid-1993, UN-administered elections led to a new constitution and the reinstatement of Norodom Sihanouk as king. The Khmer Rouge boycotted the elections, rejected peace talks and continued to buy large quantities of arms from the Cambodian military leadership. In the months following the election, a government-sponsored amnesty secured the first defections from Khmer ranks, with more defections occurring from 1994 when the Khmer Rouge was finally outlawed by the Cambodian government.

The uneasy coalition of Prince Ranariddh’s Funcinpec and Hun Sen’s Cambodian People’s Party fell violently apart in July 1997, and when the dust settled Hun Sen assumed sole leadership of Cambodia. Elections in mid-98 returned Hun Sen to this position, despite grumbling from opposition candidates about dodgy electoral practices. While his democratic credentials are far from impressive, the one-eyed strong man has proved to be something of a stabilising force for Cambodia.