This three-volume reference provides a complete guide for readers investigating the crucial interplay between war and religion from ancient times until today, enabling a deeper understanding of the role of religious wars across cultures. Containing some 500 entries covering the interaction between war and religion from ancient times, the three-volume War and Religion: An Encyclopedia of Faith and Conflict provides students with an invaluable reference source for examining two of the most important phenomena impacting society today. This all-inclusive reference work will serve readers researching specific religious traditions, historical eras, wars, battles, or influential individuals across all time periods. The A–Z entries document ancient events and movements such as the First Crusade that began at the end of the 10th century as well as modern-day developments like ISIS and Al Qaeda. Subtopics throughout the encyclopedia include religious and military leaders or other key people, ideas, and weapons, and comprehensive examinations of each of the major religious traditions' views on war and violence are presented. The work also includes dozens of primary source documents—each introduced by a headnote—that enable readers to go directly to the source of information and better grasp its historical significance. The in-depth content of this set benefits high school and college students as well as scholars and general readers.