Batroun and Byblos. On May 19 they cross the Dog River north of Beirut into Fatimid territory. There local governors supply the Crusaders with tribute and food in return for no damage to the agricultural area. The Fatimids keep no large troops in the north, except for small garrisons. May 20 – The Fatimid governor of Sidon refuses to cooperate and his garrison attacks the Crusader host while they are looting local villages. The Fatimids are repulsed, the towns further south generally follow the example of Beirut. The Crusaders move on to Tyre – Raymond IV decides to wait for two days to allow a force under Baldwin of Le Bourg (supported by knights from Antioch) to catch up with him. May 26 – The Crusaders march to Haifa and along the coast under Mount Carmel to Caesarea (modern Israel), where they rest for four days in order to celebrate Whitsun (Whit Sunday). June 2–6 – The Crusaders occupy Arsuf and turn inland towards Ramlah, where they reorganise for the march against Jerusalem. A Crusader force under Tancred liberates Bethlehem. June 7 – Siege of Jerusalem: The Crusaders reach the outskirts of Jerusalem, and begin the siege of the Holy City. Iftikhar al-Dawla offers a peace agreement but this is refused. June 13 – The Crusaders under Godfrey of Boullion launch their first assault on Jerusalem, while the Fatimid garrison and Jewish militia defend the northern wall at the Damascus Gate. June 17 – A naval squadron of six Genoese ships led by Guglielmo Embriaco (loaded with military materials) enters the port of Jaffa; all except one are trapped by a larger Fatimid fleet. July 8 – The Crusaders attempt to take Jerusalem by storm but are repulsed. In a procession they walk around the walls under leadership of priests in the hope the city would surrender. July 13 – The Crusader army (some 12,000 men) launch a final assault on Jerusalem. The attacks against the northern and southern wall are repulsed without establishing a foothold. July 15 The Crusaders breach the walls of Jerusalem after a two-pronged assault. They enter the city and, for two days, begin an unprecedented slaughter against the Muslims and Jews. Iftikhar al-Dawla surrenders Jerusalem to Raymond IV in the Tower of David with a great sum of treasure in return for his life. He is escorted out of the city with his bodyguard. July