Alliances

**What do you want to see?**
Alliances similar to those in SE5, but better. I think Stellaris has a similar feature called "federations"; we might want to check there for inspiration. Also, I wrote about a "senate" feature in my design doc for AFAR which I need to dig out...

**How would it help players?**
It would enhance the diplomatic side of the game - alliances would be similar to treaties, but manifold in terms of how many empires are in them.

**Alternatives**
Mutual treaties.

**Screenshots and mockups**
Nothing just yet...