'Fortified City' in the Bible

And you shall smite every fortified city, and every choice city, and shall cut down every good tree, and stop up all wells of water, and ruin every good piece of land with stones.

Now as soon as this letter comes to you, seeing your master's sons are with you, and there are with you chariots and horses, a fortified city also, and armor;

And the children of Israel did secretly those things that were not right against the LORD their God, and they built them high places in all their cities, from the tower of the watchmen to the fortified city.

He struck the Philistines, even unto Gaza, and the borders thereof, from the tower of the watchmen to the fortified city.