The Elric brothers in an adventure on the borders of Amestris.
Ed and Al are involved in a border war between two groups of people that the Amestrians (or as translated in the anime, the Amestrisians, which really doesn’t work for me…) have taken over, and there is much boom and whango, as we say Chez Otter.
For a backstory that was made after the actual series is over and we know what is going to happen to everyone (including that none of the main characters we know and love are going to be hurt) it was fine, fun and very watchable. Many of our favorite characters at least make an appearance (like Major Armstrong, for three seconds) but it’s mostly about Ed and Al.
A good addition to a great series.