The crusaders had left Nicaea on June 26, with a deep distrust of the Byzantines, who had taken the city without their knowledge after a long siege. In order to simplify the problem of supplies, the Crusader army had split into two groups; the weaker led by Bohemond of Taranto, his nephew Tancred, Robert Curthose, Robert of Flanders, and the Byzantine general Tatikios in the vanguard, and Godfrey of Bouillon, his brother Baldwin of Boulogne, Raymond IV of Toulouse, Stephen II, and Hugh of Vermandois in the rear.