Tallard was not anticipating an Allied attack; he had been deceived by intelligence gathered from prisoners taken by de Silly the previous day, and his army's strong position. Tallard and his colleagues believed that Marlborough and Prince Eugene were about to retreat north-eastwards towards Nördlingen. Tallard wrote a report to this effect to King Louis that morning. Signal guns were fired to bring in the foraging parties and pickets as the French and Bavarian troops drew into battle-order to face the unexpected threat.