al-Karzain. He also destroyed his own citadel at A'zaz to prevent it from being used by the Ayyubids if they were to conquer it. Fight for Mosul As Saladin approached Mosul, he faced the issue of taking over a large city and justifying the action. The Zengids of Mosul appealed to an-Nasir, the Abbasid caliph at Baghdad whose vizier favored them. An-Nasir sent Badr al-Badr (a high-ranking religious figure) to mediate between the two sides. Saladin arrived at the city on 10 November 1182. Izz al-Din would not accept his terms because he considered them disingenuous and extensive, and Saladin immediately laid siege to the heavily fortified city. After several minor skirmishes and a stalemate in the siege that was initiated by the caliph, Saladin intended to find a way to withdraw without damage to his reputation while still keeping up some military pressure. He decided to attack Sinjar, which was held by Izz al-Din's brother Sharaf al-Din. It fell after a 15-day siege on 30 December. Saladin's soldiers broke their discipline, plundering the city; Saladin managed to protect the governor and his officers only by sending them to Mosul. After establishing a garrison at Sinjar, he awaited a coalition assembled by Izz al-Din consisting of his forces, those from Aleppo, Mardin, and Armenia. Saladin and his army met the coalition at Harran in February 1183, but on hearing of his approach, the latter sent messengers to Saladin asking for peace. Each force returned to their cities and al-Fadil wrote: "They [Izz al-Din's coalition] advanced like men, like women they vanished." On 2 March, al-Adil from Egypt wrote to Saladin that the Crusaders had struck the "heart of Islam". Raynald de Châtillon had sent ships to the Gulf of Aqaba to raid towns and villages off the coast of the Red Sea. It was not an attempt to extend the Crusader influence into that sea or to capture its trade routes, but merely a piratical move. Nonetheless, Imad al-Din writes the raid was alarming to the Muslims because they were not accustomed to attacks on that sea, and Ibn al-Athir adds that the inhabitants had no experience with the Crusaders either as fighters or traders. Ibn Jubair was told that sixteen Muslim ships were burnt by the Crusaders, who then captured a pilgrim ship and caravan at Aidab. He also reported that they intended to attack Medina and remove Muhammad's