It is located on Route 7 of Laos, so east of Phoukhoune district, northwest of Phonsavan, and Ban Phou Pheung Noi, but north of Sam Thong, and Long Tieng.

It was a small town among many like the cities of Phonsavan, Plain of Jars, Lathuang, Nong Het, Long Tieng,[6] Sam Thong and many others.

Most people, The Tai Phuan, who lived there spoke a slightly different dialect from the others who came from southern and western Laos.

Then there were some itinerant merchants who were Chinese coming to sell sugars, salt, clothes, fabrics, pots, dishes and more like spoons etc.

The lake sits on a body of water surrounded by limestone rocks that form a wall in the background.

In the early 1960s, the part of the lake that faces Route 7 of Laos, seen from the front, under the limestone rocks, looked like there was a cave.

Except the Khmu people, the Khmu tribe Lao Theung, who are the first inhabitants discovered in this region for centuries before the arrival of King Fa Ngum in the middle of the 14th century, this region was ruled before by the youngest son of the king of Khun Borom.

This is how Thao Van Dee was the county chief of Muang Soui at the time of Kou Kiet Laotian Civil War.

Not to mention the commerce and the population to come, social media and administrative services began to take hold.

Along the street next to the airport, there were plenty of shops of sorts, then came the Vietnam War which rotted the whole region including the east, west, north and south of Xiangkhouang province.

Due to its location northwest of the strategic Plain of Jars, the town with its all weather runway (designated Lima Site 108 or LS-108) was a major base area for the Forces Armées Neutralistes (FAN) a "third force" in the Laotian Civil War from 1961 until 1966.

Captured by units of the PAVN 312th Division supported by PT-76 light tanks during the Campaign Toan Thang in June 1969.

[10] Royalist forces supported by U.S. airpower tried unsuccessfully to recapture Muang Soui during Operation Off Balance in early July 1969.