As probably happened in history, I am on a rampage and intend to fully obliterate an opposing faction.
As such, I do not want to have to garrison newly conquered cities, which gives me the choice of leaving a strong defence and reducing the momentum of my Bltzkrieg, or risking having he cities recaptured.
Can I "salt the earth" of conquered cities (destroy them immediately)?
IIRC, Master of Orion 2 gave the option of reducing population by 1 each turn, until the city eventually disappeared. Better than nothing, I suppose, but I want them GONE - and now.
I had considered nuking them, but often my troops are too near, and Gaea already hates me because of my production.