I'm playing a High to Low game. Despite the AI having "forgotten" that it should heal its injured units, from the mid-classical era even backwards civs that had lost some cities to barbarians managed to get them back and expand. I get switched to yet another civ, Venice this time. They had driven themselves in a corner: huge army costing absurd money, wrong civics that had their cities shrunk to a pitiful size (4-5 compared to 18ish for my previous civ and generally 12-15 for the other civs), and really horrible city placement. I change civics, abandon and re-found some cities in better places, research initially goes down to 0 to simply break even, but as population slowly grows, things get better. So I think, why not use this massive army? And I march south and invade Italy (to me, as an Italian, Venice invading Italy is hilarious for several reasons ), against whom the AI that controlled Venice had already warred, spurred on by the "assassin in capital" event. Anyway, the point of this post is: I raze a couple of Italian cities, conquer Genoa (holy city with shrine and some wonders) and then move on to Rome. And what do I see? Not only the cities are lightly defended, the italian AI keeps a decent stack of Longbows on a hill between the cities! Good defensive location, sure, but what's the point if I can waltz in and capture the best cities defended only by measly Mounted Infantries?? And I'm slogging around with a single 1-move stack, so plenty of time for the AI to react and move along their road network. But no, they just sit there, Archer Bombard a bit, and sometimes suicide Mounted Infantries against Swordsmen in a forest. Insanity Attached archive has two autosaves from the last turns (save interval: 2 turns), you can see me moving but the AI doens't move the Longbowmen from the hill, and if you attack Rome (which I did), again no reaction.