His next plan was to attack and break the base of Confederate railroad communications in northern Mississippi. For this purpose he marched towards Corinth. The Confederate general, Albert Sidney Johnston, instead of waiting to be attacked, threw his forces gallantly against the Federal army. The battle raged the whole day, without decisive results. That night General Buell brought Grant heavy reinforcements, and in the next day’s battle General Johnston was killed. The Confederates were forced back to Corinth, contending for every inch of ground. Grant’s third move was to divide the Confederacy by getting command of the posts along the Mississippi River, thus cutting off the western base of supplies. The fleet under Farragut had tried to carry out this scheme. But Vicksburg and Port Hudson were both held by the Confederates, and between these they controlled the river and brought supplies from the west. Vicksburg, called “the Gibraltar of the Mississippi,” was strongly situated. In five battles Grant drove back the Confederate forces and in May, 1863, besieged Vicksburg, resolved to starve it into surrender. Many said that this was a foolish attempt and tried to persuade Lincoln to remove Grant, but Lincoln resolved to give him a chance. Grant closed in on the Confederates and cut off their line of supplies. In July General Pemberton asked for terms and received this answer: “The unconditional surrender of the city and the garrison. I have no terms other than these.” The taking of Vicksburg was a great victory for the Federals. President Lincoln wrote Grant a personal letter: “My dear General, I do not remember that you and I ever met personally. I write this now as a grateful acknowledgment for the almost inestimable service you have done the country.... When you turned northward, I feared it was a mistake. I now wish to make a personal acknowledgment that you were right and I was wrong. Yours very truly, A. Lincoln.” Those who had tried to get Grant removed saw that they too were wrong, but they lacked the president’s manly frankness and did not confess it. Grant was given command of all the armies in the West. He went to Tennessee to relieve the division of the Union army under Rosecrans which the Confederates had hemmed up in Chattanooga. It was shut in by the Tennessee river on the north and by mountains on all other sides. Grant, with Sherman, Sheridan and other brave generals aiding him, marched up the mountain and fought a great battle on Lookout Mountain “above the clouds,” by which the troops in Chattanooga were relieved. The title of Lieutenant-General, which Washington had borne, was revived for Grant, and he went to Washington in March, 1864, to receive his commission from Lincoln. The president said in giving it, “As the country herein trusts you, so, under God, will it sustain you.”