Chapter 5 of Michael J. Decker’s book on the Byzantine art-of-war recounts the strategy and tactics used by the Byzantine Empire throughout its long history. Decker discusses the stratagems, imperial ideology, and organization of the Byzantine state apparatus centered in its capital city of Constantinople. Following the conquest of Constantinople by the Fourth Crusade in 1204 this apparatus was irrevocably destroyed by the Latin West, and even after the reconquest of the city by the Greeks it was never again on the same order of magnitude or effectiveness as before.
“…All wars were defensive. Even offensive campaigns were considered defensive, in that they aimed to recover land that had been seized from the empire and rightfully belonged to it, and this notion of the ‘forward defense’ or ‘active defense’ was something that the Romans probably imparted to Muslim jihad theorists.
“Experience taught the emperors that any period of peace was fleeting; never did this come into such sharp clarity more than in the events of the late 620s and 630s, when Heraclius found himself at the top of the wheel of fortune with his victories over the Persians, symbolized by his triumphant entry into Jerusalem in a spirit of millennial jubilation. The wheel turned, however, and within a decade Arab forces seized the whole of the Levant.
“Since the reign of Constantine I, the Romans had understood that the universe was ordered according to the principles of Christianity and the world was a reflection of the unseen cosmos:one God, one faith, one emperor, one empire.
“Subterfuge, bribery, and disinformation were prized bloodless means to undermine or dissolve enemies and were always preferred to open battle. The military manuals instruct, whenever possible, to bribe enemy commanders. Before campaigns on the frontiers, the general Nikephoros Ouranos (ca. 950-1011) ordered that gifts be sent to the emirs along the border in order for the bearers to collect intelligence and possibly induce the enemy to the Byzantine side or at least inaction in the coming conflict.
“The handbooks stress the need to surprise the enemy. Strategic surprise could be achieved by avoiding enemy agents, by disinformation, and by unexpected marches. The Strategikon warns that to avoid enemy spies armies should take little-used routes and march through uninhabited areas that were less likely to be under surveillance.
*All excerpts have been taken from The Byzantine Art of War, Westholme Publishing.