The consequence of Shiloh was, the withdrawal of the rebels from their second line of defence, by their evacuation of Corinth on the 30th of May, seven weeks afterwards, the disappointment both of their great plan of a northern invasion and of their secondary plan of holding the Memphis and Charleston Railroad line, and the opening of all Tennessee, and the North of Mississippi and Alabama, to the Union forces; the opening of the Mississippi River from Memphis down to Vicksburg; the subsequent movement which resulted in the battle of Murfreesboro and the securing of Chattanooga on the east; and the series of efforts which culminated in the capture of Vicksburg on the west. In short, this battle flung the Rebellion, in the Valley of the Mississippi, into a defensive posture, out of which it never escaped during the remainder of the war. A few days after the proclamation which gave freedom to the slaves, General Grant expressed his concurrence in it after his sober fashion, by a dry phrase in a general order on the subject of organizing colored regiments. "It is expected," he says, "that all commanders will especially exert themselves in carrying out the policy of the administration, not only in organizing colored regiments, and rendering them effective, but also in removing prejudice against them." The taking of Fort Donelson had given Grant a reputation as a prompt and vigorous fighter, and a sensible commander. The battle of Shiloh, when its extremely important results came to be understood, added to his reputation in a proportionate degree. While therefore one line of operations was decided upon, which pointed eastward and was to end in the occupation of Chattanooga, Rosecrans being placed in command, to the westward and southward, a second great enterprise was aimed, which was entrusted to Grant; which should end in the occupation of Vicksburg, and should thus complete the task which the men of the northwest had proposed to themselves at the beginning of the war, of "hewing their way to the sea." Vicksburg and Port Hudson were now the only remaining two of that series of positions, most of them really impregnable from the river, by which the rebels had throttled the great artery of western commerce. His previous career naturally enough pointed out Grant for the command of the Vicksburg campaign; and the event showed that his absolute inability to let go where he had once taken hold, his inevitable continuance in hammering at his object, were exactly the qualities needed.