Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Siege of Jerusalem took place from September 20 to October 2, 1187. It resulted in the recapture of Jerusalem by Saladin and the near total collapse of the crusader Kingdom of Jerusalem. This provoked the Third Crusade by providing it with its principal goal to return Jerusalem to Christendom a second time. The Kingdom of Jerusalem, weakened by internal disputes, was completely defeated at the Battle of Hattin on July 4, 1187. Most of the nobility of the kingdom was taken prisoner, including King Guy, and throughout the summer Saladin quickly overran the kingdom. By mid-September, Saladin had taken Acre, Nablus, Jaffa, Toron, Sidon, Beirut, and Ascalon. The survivors of the battle and other refugees fled to Tyre, the only city able to hold out against Saladin, due to the fortuitous arrival of Conrad of Montferrat.