Sin V

Sin V (Shinasthana: 文武辛, men-maq-sin; 兄辛, kmrang-sin; r. 145 – 172 CE) was a ruler of the city of Tsinh during the Late Archaic to Transitional Period.

Sin V is a key figure in Themiclesian historiography as the 57th year of his rule (222) is the starting point of the monumental history Past of Tsinh (晉故事), compiled in the early 5th century as an account of the dynasty's past. According to Bruner, that is the year when history "jumps out from the droning of sacrifices, natural disasters, and divination". Within 60 years of Sin V's death, the Classical Period begins.

In his 57th year, Sin V defeated the city of Kengak and rebuilt his border to the south. A difficult and prolonged dispute had been ongoing for an unspecified period of time with Kengak, and armed conflict had occurred sporadically. But after the third month on campaign, Kengak's forces were decisively defeated. After negotiations, a new border in the fields was established between the two cities, in favour of Tsinh as victor. Sin V made awards to ten princes and barons who were involved in some capacity with the conflict.

In the view of the author of the Past of Tsinh, this event set into motion the eventual hegemonic rule that Tsinh achieved over Themiclesia-proper.