Phnom Penh – Almost half a century ago, the U.S.-backed Gen. Lon Nol led a coup in March 1970, overthrowing Cambodia’s King Norodom Sihanouk while the monarch visited Moscow.
Sihanouk took refuge in Beijing until 1975, when brutal Khmer Rouge guerrillas leading a resistance movement against Lon Nol’s Khmer Republic captured Phnom Penh on April 17 and took over the country.
Sihanouk initially supported the Khmer Rouge regime and was installed as head of state by the communists but resigned in 1976. He spent the rest of the regime as a de facto prisoner of the Khmer Rouge, which wreaked havoc on the country, killing or starving to death an estimated 1.7 million people from 1975 to 1979.
In full: https://www.voanews.com/a/us-china-face-off-over-legacy-in-cambodia/4780344.html