[quote=GreivousKhan]
Got to love how the Legate like shouting orders mid battle almost like they expect anyone to hear them.
[/quote]

The Imperial Legions owe a lot of the way they work with the Roman Legions, I'm assuming Post-Marian Legions to be exact. Legions in battle formations were often packed nice and close to make full use of shield-walls, so they would definitely be hearing it, and if they couldn't, the order would be carried along on the line of commanders assigned to each cohort and contubernium.