First Crusade - Background

Background

See also: Muslim conquests, Reconquista, and Siege of Jerusalem (637)

The origin of the Crusades in general, and particularly that of the First Crusade, is widely debated among historians. The Crusades are most commonly linked to the political and social situation in 11th-century Europe, the rise of a reform movement within the papacy, and the political and religious confrontation of Christianity and Islam in Europe and the Middle East. Christianity had spread throughout Europe, Africa, and the Middle East in Late Antiquity, but by the early 8th century Christian rule had become limited to Europe and Anatolia after the Muslim conquests. The Umayyad Caliphate had conquered Syria, Egypt, and North Africa from the predominantly Christian Byzantine Empire, and Hispania from the Visigothic Kingdom. In North Africa, the Umayyad empire eventually collapsed and a number of smaller Muslim kingdoms emerged, such as the Aghlabids, who attacked Italy in the 9th century. Pisa, Genoa, and the Principality of Catalonia began to battle various Muslim kingdoms for control of the Mediterranean Basin, exemplified by the Mahdia campaign and battles at Majorca and Sardinia.