Along with the drawing your nations world, I think another mode in which you can draw a few nations, choose to play as one and the ai will automatically draw cards to expand, split, build forts, etc. AND form alliances with other ai as well as the player can draw the "Form Alliance" card which ties into the WAR card which when drawn allows you to declare war on another nation. If declared on an ai with an alliance, the ai well assist their allies. 

For war, there are two ways to go about it imo. Either add troops that you can train and use to take over their land or just make it a battle of draw power where you draw over their territory and the ai will try and repel your attacks. Just a suggestion and you could probably make it a lot better.

Thank you!