Upvote:1
I found it in my notes. It's called Wu-Shan-Mu. Curiously, "Wu Shan Mu Xiongnu" brought up no results on google.
"Wu-shan-mu had close ties with the Hsiung-nu. Hu-lu-ku, ruler of the Hsiungnu (96β85 b.c.), arranged a marriage with the family of the ruler of the Wu-shan-mu, establishing blood ties between the two states. In 60 b.c. Chβi-hou-shan, son of the ruler of the Hsiung-nu, having failed to inherit the throne, fled to the court of his father-in-law in
Wu-shan-mu, who played a decisive role in the election of Chβi-hou-shan to the position of ruler of the Southern Hsiung-nu in 58 b.c., at the time of the division of the Hsiungnu into two mutually hostile kingdoms. Wu-shan-mu, a minor power, could have played such a role only with the support of a Hsiung-nu military force." p. 459
http://en.unesco.org/silkroad/sites/silkroad/files/knowledge-bank-article/vol_II%20silk%20road_the%20nomads%20of%20northern%20central%20asia%20after%20the%20invansion%20of%20alexander.pdf