https://en.wikipedia.org/wiki/Military_of_the_Warring_States The nature of Qin's troops is to disperse so that each unit fights their own respective battles... The people of Qin are ferocious by nature and their terrain is treacherous. The government's decrees are strict and impartial. The rewards and punishments are clear. Qin soldiers are brave and high in morale so that they are able to scatter and engage in individual combat. To strike at Qin's army, we must entice various groups with small benefits; the greedy will abandon their general to give chase. We can then capitalize on this opportunity by hunting each group down individually and then capturing the generals that have been isolated. Finally, we must array our army to ambush their commander. —Wuzi, Master Wu 從這條目來看 秦軍的士氣比較高昂 其他國家比較weary