In 1148, the Second Crusade arrived in Syria, led by Louis VII of France and Conrad III of Germany. Nur ad-Din's victories and the Crusader's losses in Asia Minor however had made the recovery of Edessa – their original goal – practically impossible. Given that Aleppo was too far off from Jerusalem for an attack and Damascus, recently allied with the Kingdom of Jerusalem against Zengi, had entered into an alliance with Nur ad-Din, the Crusaders decided to attack Damascus, the conquest of which would preclude a combination of Jerusalem's enemies. Mu'in ad-Din reluctantly called for help from Nur ad-Din, but the crusader siege collapsed after only four days.