《汉书·传·赵充国辛庆忌传》
况且羌敌容易用计来攻破，难以用兵力去粉碎，所以臣下认为出击不利。
且羌虏易以计破，难用兵碎也，故臣愚以为击之不便。
Moreover, the Qiang enemies are easy to defeat with strategy, and difficult to defeat with force, so your subject believes that attacking them will not be effective.