 If the city fell to the army of an enemy, which it did in 1154, the strategic importance of the city would allow for a campaign to be assembled directly into the heartland of Jerusalem.The Byzantine-Antioch treaty of 1137, which outlined the rights of the Byzantine Emperor to former Byzantine lands captured by the crusading armies, would also persuade many not to campaign in the North.Despite this, an attack on a neutral territory for the benefit of Jerusalem would compromise security in the North, particularly with the growing strength of the Zengid dynasty in the territory around Aleppo and, from 1144, Edessa.