As he approached Shayzar, the local people formed themselves into a unified force for defence; they put up resistance in the marshes, but were defeated and driven back to the city, leaving the Byzantines to plunder everything in the countryside and small towns. The house of a friend of Usama, Yusuf b. Abi l-Gharib, was destroyed by a stone from a Byzantine siege-engine. Ioannes' men, organised by ethnic group, made steady progress into Shayzar despite resistance; he would have captured the city and its wealth, but for bad news of grave danger at Edessa; so he accepted gifts, including a table and cross, some of the spoils of Mantzikert, and withdrew back towards Antioch. As he left, he was attacked by the troops of 'Imad al-Din Zanki, haughtily riding their swift horses; but they paid for this pride with defeat and losses, especially the capture of two relatives of prominent men