Quote Originally Posted by KOOPS95 View Post
Actually, you can't attack a friendly alliance. There's just no option to attack when you click on their city. Genius, right?
If they declare you friendly, they can't attack you; but you need to independantly declare them friendly or they still show up as grey to you; it's up to your host to check that the alliance you make friendly is doin' the same in return, otherwise it's gunna lead to a lot of confused people...but that's Rodri's point...