During the night Sherman learned that McPherson had not succeeded in taking Resaca or breaking the railroad, and had retired to the mouth of Snake Creek Gap. Johnston was, of course, now aware of the turning movement, and before morning we had evidence that he was changing the positions of his army to meet the new situation. Sherman immediately turned his whole energy to transferring his army to McPherson's position. Hooker's Corps leading off was followed by Palmer's, and this by ours. Howard's was ordered to remain in position covering the Chattanooga railway, and to follow Johnston directly through Dalton when he left his intrenchments. The movement could not be begun till the 11th, as Stoneman with the cavalry of the Army of the Ohio was marching from Cleveland, and another day was needed to enable him to get upon our left flank, the place assigned him in the combined advance. [Footnote: _Id_., pp. 112, 113, 126.] Three days' rations in haversacks and seven more in wagons gave provisions for a short separation from our base, and orders to send back all baggage to Ringgold were strictly enforced. At daybreak of the 10th I advanced my skirmishers to reconnoitre the enemy's lines, which were found to be still held in force, and his troops on the alert. We then proceeded to wheel the whole of the corps backward in line of battle, ready to halt at any moment, and engage the enemy if he should come out and attack us. My division being on the flank, it was to regulate the movement, Judah's conforming to mine on the right, and Hovey's in reserve immediately in rear of mine. [Footnote: Official Records, vol. xxxviii. pt. iv. pp. 123, 131.] We were under a warm skirmish fire of infantry in front, and the enemy's cavalry on our left flank also followed up the movement sharply. Reinforcing the skirmish line till the enemy was driven back, a good position in rear was selected for my second line and it was made to lie down. My first line was then marched slowly to the rear over the other, to another position, where it halted and lay down in turn, whilst the other rose and marched to the rear in a similar manner. Making the troops lie down avoided the danger, incident to such a manoeuvre under fire, that the men in second line would be confused by the passing of the first line through their ranks and break their organization. [Footnote: Officers experienced in war know that manoeuvres which are easy and of fine effect on parade are difficult and even dangerous under fire, and that it is wise to simplify the tactics as much as possible. Marshal Saint-Cyr, whose reputation for tactical skill was second to none in the wars of the French Republic and Empire, thus speaks of the matter in his comments on the battle of Novi, apropos to the break of the French division Watrin, which was in two brigade lines: "La première, attaquée avec vigueur par le général Lusignan appuyé par Laudon, ne soutint qu'un moment le choc, et se rabattit