(2) The Grand Strategy Of The Roman Empire, by Edward N. Luttwak
Two proceeds into an in depth discussion of the strategic operations and thinking in the Roman world, discussing the strategic problems facing Rome, as well as manpower, troop deployments, and all things military. This book also includes extensive century by century TOE's of Roman legions as time went by. The author explains the advantages of various Roman strategic policies, both militarily and diplomatically, as well as discussing their weaknesses. In addition, the book details possible alternative approaches that may have been superior at different points throughout Roman history. This is an excellent book for grand strategic thinking, assisting the reader in *how* the Roman Empire was defended militarily, with what resources, what were the challenges, and how these challenges were met. It also enlightens the reader as to what kinds of strategic dillema's and problems potentially face all large empires.