Philip's grandfather
Robert I had campaigned in the
Holy Land, his uncle
Robert II was one of the leaders of the
First Crusade and his father Thierry went four times to the Holy Land, participating in the
Second Crusade. His father had returned disillusioned from the Holy Land, where on multiple occasions he was forced to hand over his military conquests to local nobility. Hence when Philip took the vow to go on crusade on
Good Friday of 1175, he intended to go rather as a pilgrim with limited military ambitions. He embarked on
Pentecost 1177 at
Wissant with a few Flemish and English knights and arrived in August in
Palestine. translation of the chronicle of
William of Tyre Paris, Bibliothèque nationale de France, MS fr. 9081, f. 280v. In the Holy Land, King
Baldwin IV of Jerusalem hoped that Philip would take the command of a planned invasion of
Egypt, for which purpose the crusaders had allied with the
Byzantine Empire. A Byzantine fleet of 150 galleys was waiting at
Acre when Philip arrived on 2 August 1177. Philip however did not want to take any responsibilities that would jeopardize his timely return to Flanders, and turned down the offer. He also criticized the campaign as ill-timed since at the time of the year the
Nile was at it highest level and would impede operations, and he considered it not wise to invade the place where
Saladin had amassed his best troops. Philip and King
Baldwin IV of Jerusalem were first cousins, sharing a grandfather,
King Fulk, whose daughter from his first marriage,
Sibylla of Anjou, was Philip's mother. Baldwin IV was a
leper and childless, and offered Philip the regency of the
Kingdom of Jerusalem as his closest male relative currently present there. Philip refused this as well, saying he was there only as a pilgrim. Philip left Jerusalem in October to campaign in the north for the
Principality of Antioch, participating in the siege of
Harim, a city his father Thierry had helped to conquer in 1158, but was now back in the hands of the
Malik of
Aleppo. The crusaders thought it would be an easy prey as the city had recently revolted against its king, but the city put up a defence and the crusaders had to lay siege. When
Saladin sent reinforcements to the region, the crusaders quickly accepted an offer from the city to lift the siege in return for a ransom. On the conclusion of the siege, Philip considered his duty as crusader fulfilled and left the Holy Land. He returned to Flanders through
Constantinople and met the Byzantine emperor
Manuel I Komnenos, to whom he promised to broker with the French king a marriage for the emperor's son with a French princess, which resulted in 1180 in the marriage of
Alexios II Komnenos and
Agnes of France. Meanwhile, the Byzantine alliance against Egypt was abandoned. In his
chronicle Historia rerum in partibus transmarinis gestarum ("History of Deeds Done Beyond the Sea"),
William of Tyre,
chancellor and
archbishop of Tyre, blamed Philip for this failure, but historians agree William did not write in good faith as he was deeply involved in the local politics and was rather trying to excuse his own shortcomings in the affair. William could not accept the famous and battle-experienced count did not want to get involved in the affairs of the Holy Land, and suspected that Philips came merely to Jerusalem to get two of his vassals married to Baldwin's sister
Sibylla and half-sister
Isabella. William also blamed Philips for the botched campaign against Hakim, accusing him of abandoning the siege without a fight, which was contradicted by Arabian sources. But while Philip only participated in a minor campaign, Baldwin IV defeated Saladin in November at the
Battle of Montgisard. ==War with France==