Kingdom of Champasak in the context of "Laotian Civil War"

Laos, officially the Lao People's Democratic Republic (LPDR), is the only landlocked country in Southeast Asia. Located on the Indochinese Peninsula, 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. Having a population of approximately 8 million, its capital and most populous city is Vientiane.

The country traces its historic and cultural identity to Lan Xang, a kingdom which existed from the 13th to 18th centuries. Through its location, the kingdom was a hub for overland trade. In 1707, Lan Xang split into three kingdoms: Luang Prabang, Vientiane, and Champasak. In 1893, these kingdoms were unified under French protection as part of French Indochina. Laos was under Japanese administration during World War II, gaining independence in 1945 before returning to French administration until achieving autonomy in 1949. The country regained full independence in 1953 as the Kingdom of Laos, with a constitutional monarchy under Sisavang Vong. A Civil War from 1959 to 1975 saw the communist Pathet Lao, supported by North Vietnam, China and the Soviet Union, oppose the Royal Lao Armed Forces, backed by the United States. The war ended with the establishment of the Lao People's Democratic Republic in 1975 that aligned with the Soviet Union until the latter's dissolution in 1991.

The French protectorate of Laos (French: Protectorat français du Laos) was a French protectorate in Southeast Asia of what is today Laos between 1893 and 1953—with a brief interregnum as a Japanese puppet state in 1945—which constituted part of French Indochina. It was established over the Siamese vassal, the Kingdom of Luang Phrabang, following the Franco-Siamese crisis of 1893. It was integrated into French Indochina and in the following years further Siamese vassals, the Principality of Phuan and Kingdom of Champasak, were annexed into it in 1899 and 1904, respectively.

The protectorate of Luang Prabang was nominally under the rule of its King, but actual power lay with a local French Governor-General, who in turn reported to the Governor-General of French Indochina. The later annexed regions of Laos were, however, purely under French rule. During World War II, the protectorate briefly proclaimed independence under Japanese occupation in 1945. After the surrender of Japan shortly thereafter, the restoration of French control over the country was opposed by the newly established Lao Issara government, who ultimately failed by April 1946. The protectorate was reestablished, but not too long after the kingdom was expanded to encompass all Laotian regions and given self-rule within the French Union as the Kingdom of Laos. It achieved full independence after the Franco-Lao Treaty in 1953, during the final stages of the First Indochina War. The final dissolution of French Indochina came with the 1954 Geneva Conference.

The Thonburi Kingdom was a major Siamese kingdom which existed in Southeast Asia from 1767 to 1782, centred on the city of Thonburi, in Siam or present-day Thailand. The kingdom was founded by Taksin, who reunited Siam following the collapse of the Ayutthaya Kingdom, which saw the country separate into five warring regional states. The Thonburi Kingdom oversaw the rapid reunification and reestablishment of Siam as a preeminient military power within mainland Southeast Asia, overseeing the country's expansion to its greatest territorial extent up to that point in its history, incorporating Lan Na, the Laotian kingdoms (Luang Phrabang, Vientiane, Champasak), and Cambodia under the Siamese sphere of influence.

The Thonburi Kingdom saw the consolidation and continued growth of Chinese trade from Qing China, a continuation from the late Ayutthaya period (1688-1767), and the increased influence of the Chinese community in Siam, with Taksin and later monarchs sharing close connections and close family ties with the Sino-Siamese community.

The Bassac River (Khmer: ទន្លេបាសាក់; Tonlé Bassac) or Hậu River (Vietnamese: Sông Hậu 瀧後 or Hậu Giang 後江) is a distributary of the Tonlé Sap and Mekong River. The river starts in Phnom Penh, Cambodia, and flows southerly, crossing the border into Vietnam near Châu Đốc. The name Bassac comes from the Khmer prefix pa ("father" or "male") added to sak (សក្តិ) ("power, honor"), a Khmer word borrowed from the Sanskrit sakti (शक्ति).

The Bassac River is an important transportation corridor between Cambodia and Vietnam, with barges and other craft plying the waters. A city of the same name was once the west-bank capital of the Kingdom of Champasak. Sak (សក្តិ) can also be seen in the Khmer spelling of Champasak: ចំប៉ាសក្តិ. USS Satyr (ARL-23), a recommissioned repair ship originally built for the United States Navy during World War II, served on the Bassac River during the Vietnam War.