OK, fellow AIs, lets go take the human cities with our stack of doom. We even brought a cannon with us. We have noticed the humans perform quite well by bringing artillery along their attacking stacks, so we are going to try the same. A single cannon should be sufficient to tear down the human defences.
One round later....
The human artillery has hit us hard, we will go home to heal ourselves. The rest of you keep going!
No worries, we are still strong enough. But the humans have brought many defenders to the city and our cannon missed when it fired its shot. We will keep going south to the next city that we know it has weak defences (because we cheat and all that). Let's hope those railroads are slow enough and the humans will not bring in reinforcements on time
OK you all. I will stay here and protect the cannon with my spear. I hope it will be OK, good luck to all of you guys.