Children's Crusade. With the embarrassment of the Fourth Crusade (1198-1202), all remaining crusading fervor seems to have left European warriors. There were a few thirteenth-century crusades, but these were also almost always embarrassments, such as in the case of the Children's Crusade of 1212 when a large number of adolescents thought that they could simply defeat the Muslims with their childlike faith. (It was wisely stopped by the Pope and its leaders were put to death, although some of the children did make it to Egypt, where they were sold into slavery.) That is not to state, however, that those who strived to participate in the Holy Land during that century were not earnest in their endeavors, such as the crusaders who went with Andrew II, the king of Hungary, and Leopold VI, the duke of Austria, in 1217-1219, or with Emperor...