Laotian Civil War: The Pathet Lao seizes the Laotian capital of Vientiane, forces the abdication of King Sisavang Vatthana, and proclaims the Lao People's Democratic Republic.

The Laotian Civil War was waged between the Communist Pathet Lao and the Royal Lao Government from 23 May 1959 to 2 December 1975. The Kingdom of Laos was a covert theater during the Vietnam War with both sides receiving heavy external support in a proxy war between the global Cold War superpowers. The fighting also involved the North Vietnamese, South Vietnamese, American and Thai armies, both directly and through irregular proxies. The war is known as the Secret War among the American CIA Special Activities Center, and Hmong and Mien veterans of the conflict.

The Pathet Lao, officially the Lao People's Liberation Army, was a communist political movement and organization in Laos, formed in the 20th century. The group ultimately gained control over the entire country of Laos in 1975, after the Laotian Civil War. The Pathet Lao were associated and dependent on Vietnamese communists and North Vietnam since their foundation, with the group being established after advice from Hanoi to create a Laotian counterpart of the Viet Minh or Viet Cong. During the civil war, it was effectively organised, equipped and 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.

Laos, officially the Lao People's Democratic Republic (LPDR), is the only landlocked country in Southeast Asia. It is bordered by Myanmar and China to the northwest, Vietnam to the east, Cambodia to the southeast, and Thailand to the west and southwest. The country has a population of approximately eight million. Its capital and most populous city is Vientiane. The country has Buddhist temples, including the UNESCO's World Heritage Site of Luang Prabang, and French colonial architecture.