Crusading movement

The crusading movement was a framework of ideologies and institutions that described, regulated, and promoted the Crusades. Members of the Church defined the movement in legal and theological terms based on the concepts of holy war and . Theologically, the movement merged ideas of Old Testament wars that were instigated and assisted by God with New Testament ideas of forming personal relationships with Christ. The concept of crusading as holy war was based on the ancient idea of just war, in which an authority initiates the war, there is just cause, and the war is waged with pureness of intention. Adherents saw Crusades as special pilgrimages - a physical and spiritual journey under the authority and protection of the Church. Pilgrimage and crusade were penitent acts and they considered participants part of Christ's army. While this was only metaphorical before the First Crusade, the concept transferred from the clergy to the wider world. Crusaders attached crosses of cloth to their outfits, marking them as followers and devotees of Christ, responding to the biblical passage in Luke 9:23 which instructed them to carry one's cross and follow Christ. Anyone could be involved and the church considered those who died campaigning martyrs. After the First Crusade the movement became an important part of late-medieval western culture, impacting politics, the economy and society. Crusading was strongly associated with the recovery of Jerusalem and the Palestinian holy places. The Holy Land was considered the patrimony of Christ, and its recovery was on the behalf of God. The historic Christian focus on Jerusalem as the setting for Christ's act of redemption was fundamental for the First Crusade and the successful establishment of the institution of crusading. Campaigns to the Holy Land had enthusiastic support. However, Crusades did also occur outside the Holy Land: the Iberian Peninsula; north-eastern Europe, against the Wends; the Baltic region; against heretics in France, Germany, and Hungary; and into mainly Italian campaigns against the papacy's political enemies.