The Union army marched in three columns, their flanks guarded by cavalry, and the columns always within supporting distance of one another. The steady advance and retreat went on with occasional brisk fighting. On the 14th of June, during an exchange of shots, the head of General Leonidas Polk was carried away by a cannon ball. Now and then Johnston attacked Sherman, but invariably without gaining any important advantage.

At last Sherman grew tired of continually flanking his enemy, and made the mistake of assaulting him. This was at Kenesaw Mountain on the 27th of June. The attack was made with great gallantry, but the Unionists were repulsed with the loss of 3,000 men.

Sherman returned to his flanking tactics, which were conducted with so much skill that finally Johnston was forced into the defenses of Atlanta. It was there he meant to make a stand and deliver battle on something approaching equal terms. His generals were dissatisfied with his continual falling back and protested. That Johnston was sagacious in what he did cannot be questioned; but his old enemy, President Davis, took advantage of the opportunity to remove him and place General Hood in chief command.

Hood had not half the ability of Johnston, but he believed in fighting. He assumed Johnston's place on the 17th of July. The news was pleasant to Sherman, for he rated Hood at his true value as compared with Johnston.

SHERMAN'S THREE SCOUTS
"Setting out at night they paddled continuously down the river until daylight, when they ran the boat among the reeds and remained in hiding until night came again."

It had been a long and difficult march from Chattanooga to Atlanta, and yet it may be said that Sherman had only reached his true starting-point. He gave his soldiers a needed rest, and waited for reinforcements. Those expected from Corinth, Mississippi, were routed by General Forrest, but the needed men were obtained from other quarters, and the three columns converged upon Atlanta, July 20th. The defenses extended for three miles about the city, but were not quite completed. McPherson secured possession of a hill that gave him a view of the city, observing which Hood made a furious assault upon him on the night of the 22d. He came perilously near success, but, by hastening reinforcements to the threatened point, Sherman was able to repel the attack. In the fighting General McPherson, one of the best of the Union generals, was killed.