What do you mean "one by one"

Collapse: In this case, it means disintegration and rout.

Back off: Back off. Describe (officers and soldiers) running away in panic.

Extended data

Fail and retreat.

He Qifang, in memory of General Wang Zhen: The Kuomintang army in Shanxi is retreating like a flood. " Wei Wei's "Oriental", Chapter 16, Part IV: "The enemy cries in ghosts and wolves, leaving several large bodies and retreating downwards." ?

Mao Zedong's "Two News Stories" is the same as the situation in which the Central Route Army encounters the enemy. The face-to-face enemy of our marked army has collapsed and has no fighting spirit. Our army met with weak resistance.

Reference Router _ Baidu Encyclopedia