In addition to The Crusades, all those big European military expeditions to the Middle East (and one time to Greece!) in the 11th-13th centuries, Christendom’s crusading fervor was also expressed in a number of smaller “crusades” that continued until the 15th century. Some of these smaller expeditions, like the “Alexandrian Crusade” of 1365, consisted of campaigns in the Middle East; others, like the Albigensian Crusade in the early 13th century and the Northern Crusades in the 12th and 13th centuries, targeted Christian “heretics” or the remaining pagan populations in Europe (these, in contrast to Crusades directed against Muslims, tended to go pretty well for the Crusaders). The 1396 Crusade of Nicopolis (which is often called the “Battle of Nicopolis” since it only took the one battle, spoiler alert, for the Crusade to completely collapse), did target Muslims, but Muslims on European soil. It went about as well as you’d expect.