The destruction of the French fleet had once again raised John's hopes, so he began preparing for an invasion of France and a reconquest of his lost provinces. The English barons were initially unenthusiastic about the expedition, which delayed his departure, so it was not until February 1214 that he disembarked at La Rochelle. John was to advance from the Loire, while his ally Otto IV made a simultaneous attack from Flanders, together with the Count of Flanders. The three armies did not coordinate their efforts effectively. It was not until John had been disappointed in his hope for an easy victory after being driven from Roche-au-Moine and had retreated to his transports that the Imperial Army, with Otto at its head, assembled in the Low Countries.