《左传·庄公·庄公二十九年》
凡是出兵，有钟鼓之声叫做 伐 ，没有叫做 侵 ，轻装部队快速突击叫做 袭 。
凡师有钟鼓曰伐，无曰侵，轻曰袭。
All military expeditions with drums and bells were called invasions, those without were called raids, and a quick attack with light troops was called an ambush.