What were the crusades? (article) | Khan Academy
https://www.khanacademy.org:443/humanities/medieval-world/x4b0eb531:the-crusades/x4b0eb531:a-beginner-s-guide-to-the-crusades/a/what-were-the-crusades
WEBMost of the debates among scholars are concerned with identifying the key characteristics of a crusade. Some, for example, consider only expeditions aimed at Jerusalem or the Holy Land to be crusades. This approach is responsible for the traditional, numbered crusades (i.e., First Crusade, Second Crusade, etc.).
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