I decided to work out if the AI could take cities with walls now. I used the following setup: * Domination victory only * Duel size map * Pangaea * Information era start * Deity difficulty * Online speed * Aztec opponent * Delete all starting units except for rangers and one settler, found only one city * Declare war immediately upon meeting the opponent * Do not build a military or fire with city attacks Test One: Turn 208: Start Turn 223: Meet Aztecs, declare war Turn 247: Aztec worker spotted, wanders into range of city guns Turn 249: Aztec infantry escorting settler approaches border Turn 250: Aztec infantry escorting settler moves into border, outside of city strike range. Second infantry shows up. Game ends because I forgot to turn off the turn limit. Oops. Let's try that again. Test Two: Turn 208: Start Turn 215: Meet Aztecs, declare war Turn 228: Aztecs complete the Space Race Project, Earth Satellite Turn 242: Aztecs build a city bordering mine Turn 242: Aztecs have sent two infantry and a machinegun corps to attack my allied city state, Armagh Turn 247: The city state is shooting them. A rocket artillery arrives at Armagh. Turn 248: The rocket artillery is next to Armagh, now on 40% health. Turn 250: The rocket artillery retreats on 10% health. Armagh stil unscathed. A settler and a machinegun have appeared on my border. Turn 251: The machinegun corps is just sitting next to Armagh, not shooting. The machinegun enters my borders. Turn 252: The machinegun in my territory retreats. A ranger approaches Armagh, the machinegun corps retreats from it. The ranger is shot to 10% health. Turn 253: The Aztecs nuke Armagh from a bomber. An Aztec settler moves unescorted to 2 hexes from my city. It's shielded from attack by a forest, though. Turn 254: The settler retreats. An armada of submarines approaches Armagh. Turn 257: A machinegun corps enters my borders. Turn 258: The machinegun corps is now adjacent to my city. An Aztec jet bomber bombs my city to 40% defenses. Turn 259: The machinegun corps moves to a different hex, still adjacent to my city. Turn 260: The machinegun corps moves away from my city. Turn 261: An Aztec Modern Armour Army shows up on my border. Turn 264: Two jet bombers bomb my city down to 10% health. An infantry enters my borders. Turn 267: My city has by now healed to about 40% health. Still seeing Modern Armour on the border. I contemplate building the "repair outer defenses" project, but decide it would be unsporting. Turn 268: Two Jet Bombers and an armada of nuclear submarines bombard my city to 10% health. (or more accurately, to 0% then it heals to 10% at the start of the turn) Turn 269: Two Jet Bombers and an armada of nuclear submarines bombard my city to 10% health. A mechanised infantry enters my borders. Turn 270: A Jet Bomber bombs my city. The mechanised infantry has stopped two hexes from the city. Turn 271: The Aztecs have landed on the moon. No attacks on my city though. Turn 272: Two bombers hit the city again. Turn 273: Two bombers and the sub armada bombard the city again. The mechanised infantry is still sitting, unmoving, where it has been for the last three turns. It has been joined by a worker. Turn 274: Another bomber strike. A rocket artillery army has appeared on the border. Turn 275: More bombardment. The mechanised infantry and rocket artillery begin to move away. Turn 276: More bombardment. Incidentally, Armagh is still at 0% health and defenses, despite having a population of 13. Is there some bug where nuked city health doesn't display or regenerate or something? Turn 279: Aztecs build a Mars Reactor. Bombardment continues from Jet Bombers and subs. Turn 280: Aztec territory now borders mine on three sides. Their trade roads go through my territory. Turn 281: Capital is conquered by a modern armour army that had been sitting idle for five turns. It doesn't look good, guys. The AI still seems to have a weird aversion to melee attacks on cities, even completely undefended ones.