Our sources of information in regard to the Crusades are so abundant and so rich in picturesque incidents that writers have often yielded to the temptation to give more space to these expeditions than their consequences really justify. They were, after all, only one of the great foreign enterprises which have been undertaken from time to time by the European peoples. While their influence upon the West was doubtless very important,--like that of the later conquest of India by the English and the colonization of America,--the details of the campaigns in the East scarcely belong to the history of western Europe. [Sidenote: The Holy Land conquered first by the Arabs and then by the Turks.] [Sidenote: Eastern emperor appeals to the pope for aid against the infidel Turks.] Syria had been overrun by the Arabs in the seventh century, shortly after the death of Mohammed, and the Holy City of Jerusalem had fallen into the hands of the infidels. The Arab, however, shared the veneration of the Christian for the places associated with the life of Christ and, in general, permitted the Christian pilgrims who found their way thither to worship unmolested. But with the coming of a new and ruder people, the Seljuk Turks, in the eleventh century, the pilgrims began to bring home news of great hardships. Moreover, the eastern emperor was defeated by the Turks in 1071 and lost Asia Minor. The presence of the Turks in possession of the fortress of Nicæa, just across from Constantinople, was of course a standing menace to the Eastern Empire. When the energetic Emperor Alexius (1081-1118) ascended the throne he endeavored to expel the infidel. Finding himself unequal to the task, he appealed for assistance to the head of Christendom, Urban II. The first great impetus to the Crusades was the call issued by Urban at the celebrated council which met in 1095 at Clermont in France. [Sidenote: Urban II issues the call to the First Crusade at the Council of Clermont, 1095.]