殿でん軍ぐん

noun

rear guard

Military term for the unit or role that protects the rear of a formation, especially during a retreat.

• 殿でん軍ぐんを務つとめる部ぶ隊たいは、撤てっ退たいする本ほん隊たいを敵てきの追つい撃げきから守まもる。

  The unit serving as the rear guard protects the retreating main force from enemy pursuit.