collapse at a touch;collapse at the first encounter ? 胡宗南派到河南的幾個(gè)師，也是～。(《毛澤東選集》898) The divisions which Hu Zongnan dispatched to Henan collapsed at their first encounter with the enemy.
一觸即潰yī chù jí kuì
潰：垮臺(tái)、崩潰。一碰就垮臺(tái)。形容很容易被打垮。collapse at the first encounter, collapse at a touch, be easily put to rout