Fanfiction Discussion Board - Helborn Canon

I think the perspective should come from someone who maybe isn't familiar with anything outside their daily life; i.e. a remembrancer, scholar, etc. Someone assigned tot he regiment (maybe their first assignment?) and learning the spoils of war first hand.

If you take the approach of a xenos, specifically a Tau, perhaps a prisoner of war or an ambassador.

The Horus Heresy uses this narrative device a lot.