《北史·列传·卷七》
皇帝南征时，命令元干都督中外诸军事，给予鼓吹一部，兵士三百人，自由出于殿门。
车驾南讨，诏干都督中外诸军事，给鼓吹一部，甲士三百人，出入殿门。
When the emperor went on a southern expedition, he ordered Yuan Gan to lead all military affairs at home and abroad, and gave him a set of drums and bugles and 300 soldiers, who were free to go out of the palace gate.