The Crusades covers everything from the First Crusade (1095-99) through the Ninth Crusade (1271-72).
The Crusades: Almanac discusses various topics, including the conquering of Jerusalem by the caliph Umar, pilgrimages to the Holy Land, the traditions of chivalry, Shiites and Sunnis, territorial expansion and colonization as motivations for the crusades, Knights Hospitalers and Knights Templars and more.
