You can have in-game alliances in Primary.
But you can't work together?
Or am I missing some details in this....
If you have a def pact your forces work together every time one of you gets attacked. If u have an intel alliance your spy networks benefit each other any time uare involved in any kind of spy op. If u have a research alliance u receive 10% of each others new researched tech. That is what those alliances are for. Working toegther beyond that and launching joint operations against another player, when theyve only interacted with one of u, is alliance/team play