1863: Fearing Thai and Vietnamese hegemony, King Ang Duong requests French protectorate.
1940: Japan seizes Cambodia.
1949: Cambodia becomes an Associated State in the French Union.
1953: King Norodom Sihanouk negotiates Cambodia's independence from the French.
1955: Sihanouk abdicates kingship to enter politics.
1970: Sihanouk is deposed by military.
1975: Khmer Rouge ousts US-backed Lon Nol regime after US bombing raids along Vietnam border. Sihanouk returns as temporary figurehead.
1979: Soviet-backed Vietnamese troops oust Pol Pot and Khmer Rouge forces.
1982: Three resistance groups, including Chinese-backed Khmer Rouge, form a coalition government in exile headed by Sihanouk.
1987: Sihanouk opens talks with Phnom Penh on peace.
1989: Vietnam announces its withdrawal.
1991: Three factions and Phnom Penh government agree to United Nations peace plan.