|Elevation||153 m (502 ft)|
Pakxan, Paksan or Muang Pakxan (Lao ປາກຊັນ) (French: Paksane) is a town in Bolikhamsai Province, in western Laos. It is the capital of Paksan District. The Nam Xan River joins the Mekong River at Paksan on the border with Thailand, opposite Bung Kan. Paksan is well connected to the south of Laos by Route 13.
The foundation of Paksane date from the late nineteenth century. The region had experienced a Paksane insecurity since the invasion of Annam, 1834, followed by invasions Siamese with the introduction of Siamese suzerainty over Laos in 1836 the country, but especially after 1865, the invasions of "Hos" or "red flags, Chinese gangs from Southern China. These are indeed Hos invasions that began to empty of their populations provinces of Xieng Khouang and Borikhane, but these are the Siamese who complete depopulation by deporting on the right bank of the Mekong much of Phou Eun inhabiting the region to escape the clutches of the invaders.
In 1876, the King of Siam Rama V ordered the creation of the Muong Borikhane  with the last survivors of the Ho invasion of 1874. The Muong of Borikhane is placed under the authority of Kha Luang Nong Khai. From 1885, the French who took up the neighboring Vietnam, challenged the sovereignty Siamese Laos, and after the mission of Auguste Pavie dating the Mekong to Luang Prabang, the Siamese are forced to leave the left bank Mekong and evacuate the position they had created at the mouth of the Nam Sane. At that time, Patchoum Muong (or Paxum) is the largest town near the confluence of the Nam Sane, but it is located on the Nam Sane, a half-day canoe Mekong.
In the course of the 1890s, missionaries of the Missions étrangères de Paris, attached to the mission of Christianity to a Bangkok-based Keng-Sadok, on the Mekong River, a few miles from the mouth of the Nam Sane. Then the missionaries resumed foot Paksane abandoned by the Siamese and there built a church  . In 1911, the Muong Borikhane has about 61 villages housing a population of about 4000 inhabitants. Paksane has a thousand people in 1937. In 1937, Vientiane province is cut in half. Paksane is the capital of the new province.
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- Jean-Louis Archet, Formes et résultat des activités du monde rural dans le Koueng Borikhane (Laos), mémoire de géographie du sous-développement, Université de Provence, Aix-en-Provence, 1973, p.16-17