Gongsun Zan
The northern warlord Yuan Shao had maintained good relations with the Wuhuan beyond Han borders during his campaign against rival warlord Gongsun Zan, their common enemy, in the 190s. Yuan Shao gave the chieftains of his Wuhuan allies seals and insignia as chanyus after the final destruction of Gongsun Zan at the Battle of Yijing, and reinforced the alliance by marrying the daughters of his subordinates to the Wuhuan leaders, pretending as though the daughters were his own. The Wuhuan leader Tadun was especially powerful and was thus very well-treated by Yuan Shao.