'Fortified City' in the Bible

And ye shall smite every fortified city, and every choice city, and shall fell every good tree, and stop all wells of water, and mar every good piece of land with stones.

Now as soon as this letter cometh 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 things that were not right against the LORD their God, and they built for themselves high places in all their cities, from the tower of the watchmen to the fortified city.

He smote the Philistines, even to Gaza, and its borders, from the tower of the watchmen to the fortified city.