Dr. John D.  Hosler

Associate Professor; Honors Faculty


Medieval Europe; military history; history of England; pre-modern religion

Ph.D. History - Univ. of Delaware
M.A. History - Iowa State Univ.
M.A. English Literature - Iowa State Univ.
B.A. English/History - Iowa State Univ

Professor Hosler is a historian of the European Middle Ages. His research concentration is in medieval military history and its historiographic, political, and religious contexts; in particular, he is an expert on warfare in the eleventh and twelfth century. He sits on the Editorial Advisory Board for The Journal of Military History and is a Fellow of the Royal Historical Society of Great Britain. At Morgan State, he teaches the graduate course, Holy War in Historical Perspective, and the undergraduate courses, The Ancient World, Medieval & Renaissance Europe, History of England I & II, the Crusades, the American Military Experience, Historiography, and World History I & II (Honors).

Select Publications (full CV here)

  • Books
  • Articles
    • "Niccolò Machiavelli, John of Salisbury, and the Originality of Arte della guerra," Viator 46:2 (2015): 303-333.
    • "'The Golden Age of Historiography': Records and Writers in the Reign of Henry II," History Compass 12:5 (2014): 398-411.
    • "Hundred Years War," in Oxford Bibliographies Online: Military History, ed. D. Showalter (Oxford UP, 2013).
    • "The Brief Military Career of Thomas Becket," Haskins Society Journal 15 (2006): 88-100.
    • "Henry II's Military Campaigns in Wales, 1157 and 1165," Journal of Medieval Military History 2 (2004): 53-71.
  • Book Chapters
    • "Why Didn't King Stephen Crusade?" in Travels and Mobilities in the Middle Ages: from the Atlantic to the Black Sea, eds. M. O'Doherty and F. Schmieder, International Medieval Research 21 (Brepols, forthcoming in 2015).
    • "Gregory the Great's Gout: Suffering, Penitence, and Diplomacy in the Early Middle Ages," in Where Heaven and Earth Meet: Essays on Medieval Europe in Honor of Daniel F. Callahan, eds. M. Frassetto, M. Gabriele, and J.D. Hosler (Brill, 2014), 11-32.
    • "The Norman Era," in Knights: In History and Legend (Global Books, 2009), 166-83.
    • "Revisiting Mercenaries Under Henry fitz Empress, 1167-1188," in Mercenaries and Paid Men: the Mercenary Identity in the Middle Ages, ed. J. France (Brill, 2008), 33-42.
    • "William of Newburgh, Henry II, and the Development of English Anti-Judaism," in Christian Attitudes towards the Jews in the Middle Ages: a Casebook, ed. M. Frassetto (Rutledge, 2007), 167-82.
  • Conference Proceedings & Encyclopediae
    • "Military Technology in the Writings of John of Salisbury," in ACTA 2012, Technology and Warfare: 38th International Congress of Military History Proceedings, eds. D. Minchev, J. Baev, and K. Gozev (Sofia, 2013), 71-77.
    • "Henry II, king of England" and "Richard I, king of England," in The Encyclopedia of War, ed. G. Martel, 5 vols. (Wiley-Blackwell, 2011).
    • "Henry II," "Mercenaries," "Robert Curthose," "Rochester, Siege of (1088)," and "William the Conqueror," in Medieval Warfare and Military Technology: an Encyclopedia, ed. C. Rogers, 3 vols. (Oxford UP, 2010).
    • "Peter of Celle," in The Oxford Dictionary of the Middle Ages, ed. R.E. Bjork, 4 vols. (Oxford UP, 2010).