I'm running a league/campaign for my local group sometime next year, and figured (a) some of the people here might want to copy the rules for their own purposes and (b) people here could help me if any of the rules are unclear. Please let me know if you have any questions about how it all works! Here's the rules: https://diu7u4f1bbc3e.cloudfront.net/ui/000228.pdf
Also, I designed a spreadsheet to track unique upgrades: https://docs.google.com/spreadsheets/d/1ToTHtXVL6_7xYNfuYegnQe8bgv_nTP4sV1Oj0VFERLE/edit?usp=sharing
To use the spreadsheet, you will need to make a copy of it; you can't use it without edit rights, and I'm not giving edit rights out for obvious reasons. Once you have your own copy, select a faction and click the big blue button; it will generate a random, unclaimed upgrade that either belongs to that faction or is neutral. If you type a player's name into the top box, that player will automatically be given that upgrade, and that upgrade will no longer be chosen in the future.
I intend to use the terrain card templates I posted here for this league:
Edited by Zetan
Tweaked some wording on the rules, edited the URL to point to the new version.