Fred Suppe has published Military Institutions on the Welsh Marches; and is now completing a second book on the cultural history of all the Celtic countries. Suppe’s articles and papers are on medieval military topics, including castle garrisons; decapitation in medieval England and Wales; Anglo-Welsh intermarriage; medieval Welsh ethnic nicknames; and persistence of religious function at ancient Celtic sites in Bavaria. He is a past Fulbright Fellow at University of Wales; Visiting Fellow at Harris Manchester College, Oxford University.  Suppe serves as treasurer of the Charles Homer Haskins Society (international organization of medieval historians), and as board member for the Celtic Studies Association of North America (CSANA). Of particular noteworthiness, Suppe obtained the Medieval Welsh "Dyffryn Clwyd" court-roll database for the research for the Department.