No problem with the revival, it's good question
Short answer - Some details on technology and the history of it's development in the context of the game would be good though not
vital ( As another rules set said "You don't as a commander need to know all the specification of your equipment, you pay sergeants for that" ), and as for the rest, lots of info about how each faction sees the situation and how they would react to political situations in a military fashion - in other words, an overview of what sort of scenarios would arise from their plans, aims and requirements. For example, the old Covenant was dedicated to reducing the war-making capacity of the other forces, and disarmament in general; This led to the
manner in which they could be played.