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In 1098, when Kerbogha heard that the Crusaders had besieged Antioch, he gathered his troops and marched to relieve the city. On his way, he attempted to regain Edessa following its recent conquest by Baldwin I, so as not to leave any Frankish garrisons behind him on his way to Antioch. For three weeks he pointlessly besieged the city before deciding to continue on to Antioch. His reinforcements could have perhaps ended the Crusade before the walls of Antioch, and, indeed, the whole Crusade was perhaps saved by his time wasted at Edessa. By the time he arrived, around June 7, the Crusaders had already won the siege, and had held the city since 3 June. They were not able to restock the city before Kerbogha, in turn, began besieging the city.
On 28 June, when Bohemond, the leader of the Christian army, decided to attack, the Emirs decided to humble Kerbogha by abandoning him at the critical moment. Kerbogha was taken by surprise by the organization and discipline of the Christian army. This motivated, unified Christian army was in fact so large that Kerbogha's strategy of dividing his own forces was ineffective. He was quickly routed by the Crusaders. He was forced to retreat, and returned to Mosul a broken man.