Coordinates: 36.35° N 37.03° E Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 1. ...
Joscelin I of Edessa had captured Azaz in northern Syria from the atabeg of Aleppo in 1118.
The next year the Crusaders under Roger of Salerno were severely defeated at the Battle of Ager Sanguinis, and Baldwin II of Jerusalem was captured while patrolling in Edessa in 1123.
After a long and bloody battle, the Seljuks were defeated and their camp captured by Baldwin, who took enough loot to ransom the prisoners taken by the Seljuks (including the future Joscelin II of Edessa).