We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
You have to go to the Crusade tab, and then go to the 'Global Crusade' section under that one, at the bottom it'll tell you the button to push to invade or attack. It's been a bit since I bothered attacking honestly, but nose around the crusade tab, that's
where it'll be. Oh, you can only invade territories that aren't controlled by your god.