《史记·七十列传·卫将军骠骑列传》
兵法书上说 两军交锋，军队少的一方既使坚决拚搏，也要被军队多的一方打败 。
兵法 小敌之坚，大敌之禽也 。
As the art of war states, "In a clash between two armies, even if the one with fewer troops fights desperately, it will still be defeated by the one with more troops."