後こう備び

noun

rear guard; second reserve

Military term for troops positioned at the rear for protection or as a secondary reserve force.

• 後こう備びの部ぶ隊たいが敵てきの追つい撃げきを防ふせいだ。

  The rear guard unit prevented the enemy's pursuit.

• 司し令れい官かんは後こう備びを配はい置ちして本ほん隊たいの撤てっ退たいを援えん護ごさせた。

  The commander deployed a second reserve to cover the main force's withdrawal.