Norodom Sihanouk (; Khmer: , Nrottm Seihn [nrom sjhanu]; 31 October 1922 15 October 2012) was a Cambodian statesman and royal who led Cambodia in various capacities throughout his long career, most often as both King and Prime Minister of Cambodia. In Cambodia, he is known as Samdech Euv (Khmer: , Smdch u [smac w]; meaning "King Father"). During his lifetime, Cambodia was variously called the French protectorate of Cambodia (until 1953), the Kingdom of Cambodia (19531970), the Khmer Republic (197075), Democratic Kampuchea (197579), the People's Republic of Kampuchea (197993), and again the Kingdom of Cambodia (from 1993).

Sihanouk was the only child of Prince Norodom Suramarit and Princess Sisowath Kossamak, daughter of King Sisowath Monivong. When his grandfather Monivong died in 1941, Sihanouk became king amidst French colonial rule. After the Japanese occupation of Cambodia during World War II, he secured Cambodian independence from France in 1953. He abdicated in 1955 and was succeeded by his father, Suramarit, so as to directly participate in politics. Sihanouk's political organization Sangkum won the general elections that year and he became prime minister of Cambodia. He governed it under one-party rule, suppressed political dissent, and declared himself Chief of State in 1960.

Officially neutral in foreign relations, in practice Sihanouk was closer to the communist bloc. The Cambodian coup of 1970 ousted him and he fled to China and North Korea, forming a government-in-exile and a resistance movement there. He encouraged Cambodians to fight the new government and backed the Khmer Rouge during the Cambodian Civil War. He returned as figurehead head of state after the Khmer Rouge's victory in 1975. His relations with the new government soured and in 1976 he resigned. He was placed under house arrest until Vietnamese forces overthrew the Khmer Rouge in 1979.

Sihanouk went into exile again and in 1981 formed FUNCINPEC, a resistance party. The following year, he became president of the Coalition Government of Democratic Kampuchea (CGDK), a broad coalition of anti-Vietnamese resistance factions which retained Cambodia's seat at the United Nations, making him Cambodia's internationally recognized head of state. In the late 1980s, informal talks were carried out to end hostilities between the Vietnam-supported People's Republic of Kampuchea and the CGDK. In 1990, the Supreme National Council of Cambodia was formed as a transitional body to oversee Cambodia's sovereign matters, with Sihanouk as its president. The 1991 Paris Peace Accords were signed and the UN Transitional Authority in Cambodia (UNTAC) was established the following year. The UNTAC organized the 1993 Cambodian general elections, and a coalition government, jointly led by his son Norodom Ranariddh and Hun Sen, was subsequently formed. He was reinstated as Cambodia's king. He abdicated again in 2004 and the Royal Council of the Throne chose his son, Sihamoni, as his successor. Sihanouk died in Beijing in 2012.

Between 1941 and 2006, Sihanouk produced and directed 50 films, some of which he acted in. The films, later described as being of low quality, often featured nationalistic elements, as did a number of the songs he wrote. Some of his songs were about his wife Queen Monique, the nations neighboring Cambodia, and the communist leaders who supported him in his exile. In the 1980s Sihanouk held concerts for diplomats in New York City. He also participated in concerts at his palace during his second reign.

Marshal Lon Nol (Khmer: លន់ នល់, also លន់ ណុល; 13 November 1913 – 17 November 1985) was a Cambodian politician and general who served as Prime Minister of Cambodia twice (1966–67; 1969–71), as well as serving repeatedly as defence minister and provincial governor. As a nationalist and conservative, he led the military coup of 1970 against Prince Norodom Sihanouk, abolished the monarchy, and established the short-lived Khmer Republic. Constitutionally a semi-presidential republic, Cambodia was de facto governed under a military dictatorship. He was the commander-in-chief of the Khmer National Armed Forces during the Cambodian Civil War. After the Khmer Rouge captured Phnom Penh, Lon Nol fled to the United States, first to Hawaii and Michigan and then to California, where he remained until his death in 1985.