The Kingdom of Laos was the form of government in Laos from 1947 to 1975. Located in Southeast Asia at the heart of the Indochinese Peninsula, it was bordered by Burma and China to the northwest, North Vietnam to the east, Cambodia to the southeast, and Thailand to the west and southwest. The country was governed as a constitutional monarchy beginning with its independence on 9 November 1953. It survived until December 1975, when its last king, Sisavang Vatthana, surrendered the throne to the Pathet Lao during the civil war in Laos, who abolished the monarchy in favour of a Marxist–Leninist state called the Lao People's Democratic Republic, which has controlled Laos ever since.

The Pathet Lao, officially the Lao People's Liberation Army, was a communist political movement and organization in Laos, formed in the mid-20th century. The group ultimately conquered the entire country in 1975, after the Laotian Civil War. The Pathet Lao were always closely associated with Vietnamese communists and North Vietnam. During the civil war, it was effectively organized, equipped and even led by the People's Army of Vietnam (PAVN). They fought against the anti-communist forces in the Vietnam War. Eventually, the term became the generic name for Laotian communists. Under orders from Mao Zedong, the People's Liberation Army provided 115,000 guns, 920,000 grenades and 170 million bullets, and trained more than 700 of its military officers.