'Fortified Cities' in the Bible

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

Have you not heard from afar? I made it from days of old, even I have formed it. Now I have caused it to come, and you are to cause fortified cities to crash into heaps, ruins.