How do you destroy a city?
After half an hour of looking through forum posts to no avail, I've cracked and am starting this post. So.... just how in the hell DO you destroy a city? The A.I. rushed cities into highly important resource areas that are critical to me, I took a couple of them over but I just can't fight multiple fronts right now, it would be more beneficial to me to just burn the cities to the ground and come back later with outposts after I've dealt with one of them.
I'm hoping I am missing something obvious here... because it would really suck not to be able to burn these ugly ass cities the empire A.I.s have built.