Well, my idea was more like, you would receive messages only from the subordinates directly under you. Say, if you're Napoleon, you would only receive status updates from corps commander. Things like "we've engaged the enemy", "we've reached our destination", "we need artillery support", "we're attacking this location", and so on...
There's this series of games by Peter Turcan (Waterloo, Austerlitz, and Borodino) which I'm a big fan of. I was thinking something like that, to give you an idea...