《后汉书·列传·乌桓鲜卑列传》
第二年春天，中郎将张国派从事率领南单于的一万多步兵和骑兵出边塞，击败了其至鞑，获得他们的辎重有二千多种。
明年春，中郎将张国遣从事将南单于兵步骑万余人出塞，击破之，获其资重二千余种。
In the spring of the second year, Lieutenant Zhang Guo ordered the Assistant Officer to lead the Southern Chanyu's ten thousand infantry and cavalrymen out of Jibeisai, defeated the barbarians, and obtained more than two thousand of their munitions.