noun
rebel army; insurgent forces
Refers to an organized military force opposing the established government or authority.
反乱軍は首都に向かって進軍した。
The rebel army advanced toward the capital.
Standard kanji spelling; 反乱 is the common form for 'rebellion'.
Alternate kanji spelling using 叛 (rebel); less common but still encountered.
反乱 means 'rebellion' or 'revolt' (the act or event), while 反乱軍 specifically refers to the military force carrying out the rebellion.
Compound of 反乱 (rebellion) + 軍 (army).