[16][17] In 1132, the defeated army of Zengi, Atabeg of Mosul, found their retreat blocked by the Tigris River opposite the fortress of Tikrit, where Saladin's father, Najm ad-Din Ayyub served as the warden.
[35] After Shawar was successfully reinstated as vizier, he demanded that Shirkuh withdraw his army from Egypt for a sum of 30,000 gold dinars, but he refused, insisting it was Nur ad-Din's will that he remain.
The Crusader force enjoyed early success against Shirkuh's troops, but the terrain was too steep and sandy for their horses, and commander Hugh of Caesarea was captured while attacking Saladin's unit.
Although positions were complicated by rival Muslim leaders, the bulk of the Syrian commanders supported Saladin because of his role in the Egyptian expedition, in which he gained a record of military qualifications.
He began granting his family members high-ranking positions in the region; he ordered the construction of a college for the Maliki branch of Sunni Islam in the city, as well as one for the Shafi'i denomination to which he belonged in al-Fustat.
In the early summer of 1174, Nur ad-Din was mustering an army, sending summons to Mosul, Diyar Bakr, and the Jazira in an apparent preparation of an attack against Saladin's Egypt.
[56] In the wake of Nur ad-Din's death, Saladin faced a difficult decision; he could move his army against the Crusaders from Egypt or wait until invited by as-Salih in Syria to come to his aid and launch a war from there.
He could also take it upon himself to annex Syria before it could possibly fall into the hands of a rival, but he feared that attacking a land that formerly belonged to his master—forbidden in the Islamic principles in which he believed—could portray him as hypocritical, thus making him unsuitable for leading the war against the Crusaders.
In this emergency, the emir of Damascus appealed to Saif ad-Din of Mosul (a cousin of Gumushtigin) for assistance against Aleppo, but he refused, forcing the Syrians to request the aid of Saladin, who complied.
[65] On 11 May 1175, a group of thirteen Assassins easily gained admission into Saladin's camp, but were detected immediately before they carried out their attack by Nasih ad-Din Khumartekin of Abu Qubays.
[68][69] Meanwhile, Saladin's rivals in Syria and Jazira waged a propaganda war against him, claiming he had "forgotten his own condition [servant of Nur ad-Din]" and showed no gratitude for his old master by besieging his son, rising "in rebellion against his Lord".
Heavily outnumbered, Saladin initially attempted to make terms with the Zengids by abandoning all conquests north of the Damascus province, but they refused, insisting he return to Egypt.
His assaults were again resisted, but he managed to secure not only a truce, but a mutual alliance with Aleppo, in which Gumushtigin and as-Salih were allowed to continue their hold on the city, and in return, they recognized Saladin as the sovereign over all of the dominions he conquered.
When the treaty was concluded, the younger sister of as-Salih came to Saladin and requested the return of the Fortress of A'zaz; he complied and escorted her back to the gates of Aleppo with numerous presents.
[74] Saladin had by now agreed to truces with his Zengid rivals and the Kingdom of Jerusalem (the latter occurred in the summer of 1175), but faced a threat from the Isma'ili sect known as the Assassins, led by Rashid ad-Din Sinan.
Initially, Saladin attempted to organize his men into battle order, but as his bodyguards were being killed, he saw that defeat was inevitable and so with a small remnant of his troops mounted a swift camel, riding all the way to the territories of Egypt.
His forces in Hama won a victory over their enemy and brought the spoils, together with many prisoners of war, to Saladin who ordered the captives to be beheaded for "plundering and laying waste the lands of the Faithful".
He ordered one of his generals, Farrukh-Shah, to guard the Damascus frontier with a thousand of his men to watch for an attack, then to retire, avoiding battle, and to light warning beacons on the hills, after which Saladin would march out.
In April 1179, the Crusaders and Templars led by King Baldwin expected no resistance and waited to launch a surprise attack on Muslim herders grazing their herds and flocks east of the Golan Heights.
Although his deputies continued to send him revenues from the province, centralized authority was lacking and an internal quarrel arose between Izz ad-Din Uthman of Aden and Hittan of Zabid.
Saladin promptly impressed the inhabitants of the town by publishing a decree that ordered a number of taxes to be canceled and erased all mention of them from treasury records, stating "the most miserable rulers are those whose purses are fat and their people thin".
[108] Nonetheless, Imad ad-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.
[115] Saladin attempted to gain the Caliph an-Nasir's support against Izz ad-Din by sending him a letter requesting a document that would give him legal justification for taking over Mosul and its territories.
He also promised that if Mosul was given to him, it would lead to the capture of Jerusalem, Constantinople, Georgia, and the lands of the Almohads in the Maghreb, "until the word of God is supreme and the Abbasid caliphate has wiped the world clean, turning the churches into mosques".
According to Imad ad-Din, after Tell Khalid, Saladin took a detour northwards to Aintab, but he gained possession of it when his army turned towards it, allowing him to quickly move backward another c. 100 km towards Aleppo.
[123] The outrage also led Saladin to resolve to dispense with half-measures to rein in the unruly lord of Kerak, and to instead topple the entire edifice of the Christian Kingdom of Jerusalem, thus precipitating the invasion of the summer of 1187.
Saladin preferred to take Jerusalem without bloodshed and offered generous terms, but those inside refused to leave their holy city, vowing to destroy it in a fight to the death rather than see it handed over peacefully.
Saladin's response is not recorded, but the queen's efforts seem to have been successful as Jacques de Vitry, the Bishop of Acre, reports the Georgians were, in contrast to the other Christian pilgrims, allowed a free passage into the city with their banners unfurled.
"[136] It is equally true that his generosity, his piety, devoid of fanaticism, that flower of liberality and courtesy which had been the model of our old chroniclers, won him no less popularity in Frankish Syria than in the lands of Islam.
Much has been written about the sultan during his own lifetime and since, but the fact that an appreciation for his diplomacy and leadership skills can be found in both contemporary Muslim and Christian sources would suggest that Saladin is indeed worthy of his position as one of the great medieval leaders.