Warfare on the periphery of Europe and across cultural boundaries is a particular focus of this volume. One article, on Castilian seapower, treats the melding of northern and southern naval traditions; another clarifies the military roles of the Ayyubid and Mamluk miners and stoneworkers in siege warfare; a third emphasizes cultural considerations in an Icelandic conflict; a fourth looks at how an Iberian prelate navigated the line between ecclesiastical and military responsibilities; and a fifth analyzes the different roles of early gunpowder weapons in Europe and China, linking technological history with the significance of human geography. Further contributions also consider technology, two dealing with fifteenth-century English artillery and the third with prefabricated mechanical artillery during the Crusades. Another theme of the volume is source criticism, with re-examinations of the sources for Owain Glyndwr's (possible) victory at Hyddgen in 1401, a (possible) Danish attack on England in 1128, and the role of non-milites in Salian warfare. Contributors: Nicolas Agrait, Tonio Andrade, David Bachrach, Oren Falk, Devin Fields, Michael S. Fulton, Thomas K. Heeboll-Holm, Rabei G. Khamisy, Michael Livingstone, Dan Spencer, L.J. Andrew Villalon