collapse at a touch;collapse at the first encounter ❍ 胡宗南派到河南的几个师，也是～。(《毛泽东选集》898) The divisions which Hu Zongnan dispatched to Henan collapsed at their first encounter with the enemy.
一触即溃yī chù jí kuì
溃：垮台、崩溃。一碰就垮台。形容很容易被打垮。collapse at the first encounter, collapse at a touch, be easily put to rout