'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 fountains of water, and mar every good piece of land with stones.

And 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, also a fortified city, and armor,

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

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