This is the first update of A Cumulative Bibliography of Medieval Military History and Technology, which appeared in 2002. It is meant to do two things: to present references to works on medieval military history and technology not included in the first volume; and to present references to all books and articles published on medieval military history and technology from 2000 to 2002. These references are divided into the same categories as in the first volume and cover a chronological period of the same length, from late antiquity to 1648, again in order to present a more complete picture of influences on and from the Middle Ages. It also continues to cover the same geographical area as the first volume, in essence Europe and the Middle East, or, again, influences on and from this area. The languages of these bibliographical references reflect this geography.