By the 2nd century AD Tangkhuls were living in Samshok (Thuangdut) in Myanmar. Ptolemy, a Greek astronomer and geographer of Alexandria, in his "Geography of Further India" c. 140 AD, referred to the Tangkhul Naga (Nangalogue) at Triglypton (Thuangdut). Tangkhuls began to disperse from Samshok after the invasion of Ko-lo-feng and his successor I-mau-shun the king of Nan-chao in the closing part of the 8th century AD and beginning of the 9th century. They were further driven towards the north west of Myanmar by the Shan people.