[1] In the summer of 65 AD, the Northern Xiongnu tried to cross the Yellow River but turned back when they saw that Han forces were ready for them.
[2] In 73 AD, Han General Dou Gu led an expedition against the Northern Xiongnu and defeated them at the Battle of Yiwulu.
Huxie sent his Tuqi of the Left Xin to accompany the main column led by Zhai Tong and Wu Tang.
Xin was mad at Zhai Tong for some reason and gave him false directions, causing the main column to miss the battle.
[2] In 74 AD, the Northern Xiongnu tried to take Zhuoye Mountain, but Huxie sent light horsemen accompanied by Han militia to stop them.