King Louis VII led the French army on the march across Europe and Asia Minor to Jerusalem. The army decided to march along the coast of Asia Minor, because the defeat of Emperor Conrad of Germany and his army at Dorylaeum had made it clear that marching inland was too dangerous. In December 1147 the army was marching across the valley of the river Maeander to reach the major port of Adalia. Odo of Deuil, who participated in the march, makes it clear that the Maeander Valley was treacherous. Its mountain crags and slopes allowed the Turks to constantly harass the Crusaders with lightning raids.