[1]: 1–3 The ruins of Mueang Soi have been submerged since 1964 due to the operation of the Bhumibol Dam.

[1]: 5 Before the establishment of the Lan Na Kingdom, the northern region of Thailand was dotted with small city-states scattered along the plains of major rivers.

Its territory covered lower Mae Tuen (แม่ตื่น) and Ping River Basins in the present-day Sam Ngao district, Tak province.

[2]: 2213 Mueang Soi was destroyed by the Burmese troops and left abandoned in the 18th century due to the Burmese–Siamese wars.

[1]: 1, 3  However, some scholars state Mueang Soi was destroyed earlier during the siege of Lan Na by King Naresuan of the Ayutthaya Kingdom in the late 16th century; Mueang Soi was then an Ayutthaya's vassal.