[Xietor]

I would actually like to see ulm, at around construction 7, get a cannon, that could fire at a decent range and not so great accuracy, but would have a substantial physical impact to anyone in the aoe range.

The cannon would have a map movement of 1, and a battle movement of zero. Meaning if you retreated, you lose the cannons. I also think it would take a unit like the siege engineer to operate it, and if he was killed, the cannon could not be fired on moved from the province it was in.

cannons would be most devastating in castle defense. But they would have ammo of only 6 per battle, and the number of cannons one could use would be limited by the siege engineers you had. In other words if you had 10 cannon, but 3 siege engineers, you would only have 3 cannons in use for that battle.

maybe the siege engineers would also have to be summoned, and have a fairly high gem cost(20).