Its a good read, sets things up for Historical:Reunification War.
Spot on.
Also showcases how small some of the Age of War armies were. I would have liked to have seen more era-specific battles, etc., but it's a nice lead in to the larger H: RW. The rule references to what we'll see in RW made me uber happy.
I did very much enjoy the break down of the Clan-style of war. Mostly because it states zero WMDs. Makes the likelihood of nuclear armed SDSs less than likely, along with a much needed boost to the reasoning behind the WoB's style of Jihad.