youngest daughter Jovetta, were provided secure the payment of the balance, Baldwin II was released from the Citadel of Aleppo on 29 August 1124. Jovetta was held by il-Bursuqi and were ransomed by Baldwin II in 1125 using his spoils from the Battle of Azaz of 1125. Toghtekin died in February 1128, and Baldwin II began the Crusade of 1129, also known as the Damascus Crusade, shortly thereafter. The objective was Damascus, now led by the new atabeg Taj al-Muluk Buri, the son of Toghtekin. The Crusaders were able to capture the town of Banias, but were unable to take Damascus despite coming within six miles of the town. Baldwin II and Morphia married their eldest daughter Melisende of Jerusalem to Fulk V of Anjou in 1129 in anticipation of a royal succession. Baldwin II fell ill in Antioch and died on 21 August 1131. Fulk and Melisende were crowned joint rulers of Jerusalem on 14 September 1131 in the same church where Baldwin II had been laid to rest. Fulk assumed full control of the government, excluding Melisende, as he favored fellow Angevins to the native nobility. The rise of Zengi At the same time, the advent of Imad ad-Din Zengi saw the Crusaders threatened by a Muslim ruler who would introduce jihad to the conflict, joining the powerful Syrian emirates in a combined effort against the Franks. He became atabeg of Mosul in September 1127 and used this to expand his control to Aleppo in June 1128. In 1135, Zengi moved against Antioch and, when the Crusaders failed to put an army into the field to oppose him, he captured several important Syrian town. He defeated Fulk at the Battle of Ba'rin of 1137, seizing Ba'rin Castle. In 1137, Zengi invaded Tripoli, killing the count Pons of Tripoli. Fulk intervened, but Zengi's troops captured Pons' successor Raymond II of Tripoli, and besieged Fulk in the border castle of Montferrand. Fulk surrendered the castle and paid Zengi a ransom for his and Raymond's freedom. John II Komnenos, emperor since 1118, reasserted Byzantine claims to Cilicia and Antioch, compelling Raymond of Poitiers to give homage. In April 1138, the Byzantines and Franks jointly besieged Aleppo and, with no success, began the Siege of Shaizar, abandoning it a month later. On 13 November 1143, while the royal couple were in Acre, Fulk was killed in a hunting accident. On Christmas Day