'Fortifications' in the Bible

He brings down the high fortifications of your walls and lays them low; he will raze them to the ground, right down to the dust.

I will camp against you and encircle you,And I will hem you in with siege works,And I will raise fortifications against you.

And the multitude of all the nations that war against Ariel, even all that war against her and her fortifications, and that distress her, shall be as a dream of a night vision.