The Crusaders capture Jerusalem, 1099...
In the year 637 the armies of Islam lead by the Caliph Omar conquered the city of Jerusalem, the center of the Christian world and a magnet for Christian pilgrims. The city's Muslim masters exhibited a certain level of religious tolerance. No new churches were to be built and crosses could not be publicly displayed outside church buildings, but the pilgrims were allowed to continue their treks to the holiest shrines of Christendom (the pilgrims were charged a toll for access). The situation remained stable for over 400 years. Then, in the latter part of the 11th century, the Turks swarmed westward out of Central Asia overrunning all that lay in their path. Jerusalem fell to them in 1076. The atmosphere of tolerance practiced by the followers of Omar was replaced by vicious attacks on the Christian pilgrims and on their sacred shrines in the Holy City. Reports of robberies, beatings, killings, degradation of holy sites and the kidnapping for ransom of the city's patriarch made their way back to Europe. To the Europeans the Holy Land was now in the smothering grip of the Infidel and something must be done.
In response, Pope Urban II called a conference at the city of Clermont, France in 1095, concluding the eight days of deliberation with one of history's most influential speeches. Mounting a lofty scaffold, the Pope exhorted the assembled multitude to wrest the Holy Land from the hands of the Infidel and assured them that God would absolve them from any sin associated with the venture. His words fell on receptive ears as the crowd responded with cries of "It is the will of God!", "It is the will of God!". The Crusades had begun.
The First Crusade was the most successful in that it actually accomplished what it set out to do - conquer Jerusalem. But it had its problems. Responding to the Pope's challenge, thousands of peasants rallied to the cause motivated by a combination of religious fervor and the desire to escape their squalid condition at home. Led by Peter the Hermit and Walter the Penniless the hapless rabble marched across Europe to Constantinople, only to be slaughtered by the Turks soon after crossing the Bosphorus into Asia Minor.
In the meantime, the nobility of Europe raised an army of thousands that made its way through various routes and with much mishap to Constantinople. Unfortunately, many of these crusaders could not wait until they met the Muslims on the field of battle to demonstrate their religious zeal. As they progressed through Europe many Jewish communities became the target of their wrath and thousands were massacred.
In the spring of 1097, a host of over 100,000 crusaders joined forces on the eastern side of the Bosphorus. The combined army then fought its way along the coast of the Mediterranean reaching the gates of Jerusalem in June of 1099.