noun
Refers to the event or state of losing a battle or war. Often used in historical or military contexts.
その将軍は敗軍の責任を取って辞任した。
The general resigned, taking responsibility for the defeat.
noun
defeated army
Refers to the army or troops that have been defeated. Can also be used figuratively for a losing side.
敗軍は城へ退却した。
The defeated army retreated to the castle.