noun, noun or participle which takes 'suru', intransitive verb
withdrawing from a castle; leaving a castle
Historical term referring to the act of a lord or garrison leaving a castle, often after a siege or by order. Used in descriptions of feudal warfare and castle life.
城主は夜陰に乗じて下城した。
The castle lord withdrew from the castle under cover of night.
籠城の末、兵たちは下
After a long siege, the soldiers were forced to leave the castle.