'Fortified Cities' in the Bible

And it came to pass in the fourteenth year of king Hezekiah, that Sennacherib king of Assyria came up against all the fortified cities of Judah, and took them.

Hast thou not heard that long ago I did it, and that from ancient days I formed it? Now have I brought it to pass, that thou shouldest lay waste fortified cities into ruinous heaps.