Hello,
I'm playing on very hard the campaign mission of the city of Handan where you have to build the Great Wall. Ji is always super agressive so I usually end up being vassalized. I kept up with his demands for a while while building up an army then started denying him his tribute. First weird thing is that he attacked with no warning for some reason, so far I always got a heads up before. But anyway, I destroyed most of his army, except a single, lone catapult. It's complicated by the bug that I can't tell my units to go on the Great Wall construction site, where the AI put their catapult. I managed to draw it out of the building site, but the catapult somehow murdered my infantry and cavalry alike. Any tips on how to defeat catapult units?