The journey to Jerusalem: Louis had an uneventful journey, and Manuel quickly shipped him across the Bosphorus. In the Cadmus mountains the army got seperated and the vanguard were attacked and lost a lot of men, horses, and supplies. Louis handed control over to the Templars, who won a succession of skirmishes. Louis arrived in Antioch in 1148, where Raymond of Antioch greeted them, hoping to persuade them to take Aleppo to consolidate his own position. However, Louis refused to help and moved onto Jerusalem
If Manuel helped Raymond get Aleppo, Raymond promised he would return Antioch to Manuel
There are three reasons Louis refused to help Raymond: he had an intense desire to get to Jerusalem; taking Aleppo would be a precursor to taking Edessa, but Edessa was no longer a viable target, so why take Aleppo when all it would achieve would be to increase Raymond's influence and his overlord Manuel (Louis had no way of knowing Raymond's real intentions); and third, it was thought that Eleanor of Aquitaine (Louis' wife), was having an affair with her uncle