I was going to suggest some books, before being sidetracked with the Trepida thing (it's introduction date should be moved back to whenever the TL14 age of the Imperium is, it's too ubiquitous for being so new, considering the logistical footprint systems like AFV's have).
In the past I had memorized not only the LBB's but this:
plus the reading list and whatever our instructors threw on top of that.
Then again, maybe just:
The Authority of the Military Leadership
Military authority, directing the armed forces, is the matter of the authoritative power of the leading general.
If the general can hold the authority of the military and operate its power, he oversees his subordinates like a fierce tiger with wings, flying over the four seas, going into action whenever there is an encounter.
If the general loses his authority and cannot control the power, he is like a dragon cast into a lake, he may seek the freedom of the high sea, but how can he get there?
-Kongming
Enough would be to know some theory like economy of force: http://en.wikipedia.org/wiki/Economy_of_force
Principles of war: http://en.wikipedia.org/wiki/Principles_of_War
and stuff like force majeure: http://en.wikipedia.org/wiki/Force_majeure
Which applies not just to combat, but contracts, such as if the Imperial Marines arrive, the average merc isn't going to take them on.
Hortalez et Cie: http://wiki.travellerrpg.com/Hortalez_et_Cie could also be detailed in how they are a mercenary clearing house.
One thing I really liked from the original was the morale rules.