Pedzisa mutsara unotevera: Sihanouk akava mambo panguva yaitonga France muna 1941 pakafa sekuru vake vaamai, Mambo Monivong. Mushure mokunge
Kubata kweJapan kweCambodia munguva yeHondo Yenyika II, akachengetedza rusununguko rweCambodia kubva kuFrance muna 1953. Akasiya chigaro muna 1955 uye akatsiviwa nababa vake, Suramarit, kuti apinde zvakananga mune zvematongerwe enyika. Sangano rezvematongerwe enyika raSihanouk Sangkum rakakunda musarudzo huru gore iroro uye akava mutungamiriri wehurumende yeCambodia. Akautonga pasi pokutonga kwebato rimwe, akadzvinyirira kusabvumirana kwezvematongerwe enyika, uye akazvizivisa amene kuva Musoro weHurumende muna 1960.