I had an idea that we could have achievements in NaR. They wouldn't really do anything, other then just be sparky banners that people can put on their nation description. The maximum amount of achievements that a player will be able to display on their nation would be three.
To the achievements themselves, they don't need to be over-complicated, they can as simple as 'Declare your first war', 'Join an alliance', 'Create your own alliance', 'Reach the maximum level for a building', 'Have an active trade agreement', 'Have your nation reach X days old', etc.
Again, there's not much they'd do, just something players can get and that they'll be able to display. It could also be tied to the tasks that everyone has.

If wanted, I could also maybe design some banners if needed.

That would be cool! I definitely agree there should be. they would be like tasks but with image you can place on your nation page for a reward