In 1927, Sisowath Monivong's father died, so at age 52 Sisowath Monivong ascended to the throne. Like his father and his uncle, Monivong was simply a
figurehead for the French administration and, in the words of one author, Monivong "caused the French no trouble". The real power was in the hands of the French Resident-General. The King was surrounded by his Royal Council composed of his cousins: Sisowath Rathary (father of
Sisowath Sirik Matak),
Sisowath Watchayavong, Norodom Phanouvong,
Norodom Suramarit and Norodom Singhara. It was during Monivong's rule that Cambodia became open to outside communist influences. In 1930, the Vietnamese leader
Ho Chi Minh founded the
Indochinese Communist Party which subsequently obtained popularity in Cambodia. The Cambodian communists' primary objective was to overthrow the French. In 1940, when the
French Third Republic fell to
Nazi Germany, the "
Vichy France" regime took power in the
unoccupied parts of France and in its
overseas colonies, including Cambodia. In the late 1930s, a powerless Monivong noticed that
Imperial Japan was making inroads in Vietnam. Japan then invaded and occupied Cambodia in early 1941. The Japanese allowed Cambodian Vichy French officials to administer, but only under Japanese protection. The Cambodian king was beholden to the Vichy French, who were in turn beholden to the Japanese. In western Cambodia,
Thailand, now an ally of the Japanese, occupied territory. As the Japanese and Thai oppression of Cambodians became evident, Sisowath Monivong retired to
Kampot in late 1941 and died at
Bokor the same year. He died taking the posthumous title of
Preah Karuna Preah Sisowath Monivong Preah Khatiyakot (). His son
Sisowath Monireth was the heir to the throne, but the French authorities chose
Sisowath Kossamak's nineteen-year-old son
Norodom Sihanouk to succeed him instead, mistakenly believing that he would be more pliable than Monireth. Two of his children, Sisowath Monireth and Sisowath Monipong, would go on to serve as
prime minister. ==References==