rampart

noun
  1. A defensive wall or bank around a castle, fort, or settlement, typically made of earth and often topped with a parapet. noun
    The soldiers stood guard on the rampart, watching for any signs of an approaching enemy.
    The ancient city was protected by high ramparts that had withstood many sieges over the centuries.
  2. A broad embankment raised as a fortification, often including a parapet. noun
    The rampart was constructed to provide a strategic advantage against invaders.
    During the medieval period, ramparts were essential for the defense of towns and cities.