Dr. John Hosler

Office Location: 
325 Holmes Hall

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.


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 an historian of the European Middle Ages. His research concentration is medieval military history and strategy and its historiographic, political, and religious contexts; in particular, he is an expert on warfare in the twelfth century and the Crusades. He is the President of De Re Militari (the Society for Medieval Military History), sits on the Editorial Advisory Board for The Journal of Military History, and is a Fellow of the Royal Historical Society (FRHistS). 


Undergraduate: The Ancient World; Medieval & Renaissance Europe; History of England I & II; the Crusades; the American Military Experience; Historiography; Conspiracy Theory in History; World History I & II (Honors)

Graduate: Holy War in Historical Perspective; North African/Mediterranean Military History; Independent Study

Select Publications (full CV here; research available at academia.edu)

  • Books:
  • Peer-Reviewed Articles:
    • "Pre-Modern Military History in U.S. Doctoral Programs: Figures and Implications," Journal of Military History 82:1 (Jan 2018).
    • "Reframing the Conversation on Medieval Military Strategy," Journal of Medieval Military History 15 or 16 (forthcoming, 2017 or 2018).
    • "Clausewitz's Wounded Lion: a Fighting Retreat at the Siege of Acre, November 1190," in The Falls of Acre: 1104, 1187, 1191, and 1291, ed. J. France (Brill, forthcoming).
    • "The War Councils and Military Advisers of Louis VII," in Louis VII and his World, eds. M. Bardot and L. Marvin (Brill, forthcoming).
    • "Chivalric Carnage? Fighting, Capturing and Killing the Enemy at the Battles of Dol and Fornham in 1173," in Prowess, Piety and Public Order in Medieval Society: Studies in Honor of Richard W. Kaeuper, eds. C.M. Nakashian and D.P. Franke (Brill, 2017), 36-61.
    • "Identifying King Stephen's Artillery," Journal of Conflict Archaeology 10:3 (2015): 192-203.
    • "Niccolò Machiavelli, John of Salisbury, and the Originality of Arte della guerra," Viator 46:2 (2015): 303-333.
    • "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, 2015), 121-42.
    • "'The Golden Age of Historiography': Records and Writers in the Reign of Henry II," History Compass 12:5 (2014): 398-411.
    • "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.
    • "Hundred Years War," in Oxford Bibliographies Online: Military History, ed. D. Showalter (Oxford UP, 2013).
    • "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.
    • "The Brief Military Career of Thomas Becket," Haskins Society Journal 15 (2006): 88-100.
    • "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.
    • "Henry II's Military Campaigns in Wales, 1157 and 1165," Journal of Medieval Military History 2 (2004): 53-71.
  • Conference Proceedings & Encyclopedia Entries:
    • "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).