books.google.com - The Byzantine Empire in the early Seventh Century suffered a series of disastrous setbacks at the hands of the Sassanid Persians. Under the Emperor Heraclius the Byzantine Army reorganized its tactics and strategy to inflict a series of crushing defeats on the Sassanids that culminated at Nineveh in...http://books.google.com/books/about/The_Sword_and_Shield_of_God_Byzantine_St.html?id=Ec3AEyp2-LcC&utm_source=gb-gplus-shareThe Sword and Shield of God: Byzantine Strategy and Tactics Under Heraclius During the Last Persian War and First Arab War
