'Fortified Cities' in the Bible

Joshua and the Israelites almost totally wiped them out, but some survivors did escape to the fortified cities.

Now, assign me this hill country which the Lord promised me at that time! No doubt you heard at that time that the Anakites live there in large, fortified cities. But, assuming the Lord is with me, I will conquer them, as the Lord promised."

The fortified cities included Ziddim, Zer, Hammath, Rakkath, Kinnereth,