丢盔卸甲 to throw away one's helmet and armor
Explanation
形容军队战败溃逃，丢弃盔甲的景象，也比喻彻底失败，一败涂地。
Describes the scene of a defeated army abandoning their helmets and armor and fleeing; also used to describe a complete collapse and defeat.
Origin Story
话说三国时期，蜀汉军队在与魏国交战中遭遇惨败。诸葛亮率领的精锐部队，在敌军强大的攻势下，损失惨重，最终不得不丢盔卸甲，狼狈逃窜。士兵们丢弃了盔甲兵器，抱头鼠窜，军营顿时乱成一团。这场战役，蜀汉损失数万兵将，士气大减，为蜀汉后期的战略部署带来了巨大的困难。此役之后，“丢盔卸甲”便成为了形容军队战败溃逃的常用词语，也用来比喻彻底失败的景象。
During the Three Kingdoms period, the Shu Han army suffered a disastrous defeat in a battle against the Wei Kingdom. Zhuge Liang's elite troops, under the powerful offensive of the enemy army, suffered heavy losses and were finally forced to abandon their helmets and armor and flee in disarray. Soldiers discarded their armor and weapons, fleeing in panic, and the military camp instantly became a mess. In this battle, Shu Han lost tens of thousands of soldiers, morale plummeted, and brought great difficulties to Shu Han's later strategic deployment. After this battle, "throwing away helmets and armor" became a common term to describe an army's defeat and fleeing, and is also used to describe a scene of complete failure.
Usage
主要用于形容军队战败逃窜的场景，也用来比喻彻底失败。
Mainly used to describe the scene of an army's defeat and escape, also used to describe a complete failure.
Examples
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敌军丢盔卸甲，狼狈逃窜。
di jun diu kui xie jia,lang bei tao cuan
The enemy troops threw away their helmets and armor and fled in a panic.
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面对强大的对手，他们丢盔卸甲，溃不成军。
mian dui qiang da de duishou, tamen diu kui xie jia, kui bu cheng jun
Faced with a powerful opponent, they threw away their helmets and armor and were completely defeated..