Hullu Hevonen wrote:
I think there should be different types of alliances. Economic alliance(no taxation on trades between parties and enables freetrade), Military alliance(includes offencive version of the mutual defence treaty, and includes transit right), Mutual defence(a defencive military alliance, does only allow transit rights during war), Political union(merges two nations as one(in multiplayer they would allow player to co-govern the nation and break the treaty and breaking the country) and total alliance(includes all alliances).
You know somthing like this would be doable via moding. Probly less then an hour. A bit more to make sure you got it all right. And then a cache to verify its working.