On June 22d, Custer and the Seventh Cavalry left camp on the Rosebud in compliance with their instructions. On the 23d and 24th, many of the camping places of the Indians, in their migration westward, were passed. By evening of June 24th, the trail and signs had become so hot and fresh that a halt was ordered to await tidings from the scouts. Their information proved that the Indians were across the divide, over in the valley of the Little Horn. Custer, confident of his ability to whip the Indians single-handed, prepared for fight at once. He pushed ahead on the trail, and created the impression that it was his determination to get to the spot, and have one battle royal with the Indians, in which he and the Seventh should be the sole participants on our side, and in consequence the sole heroes. The idea of defeat seems never to have occurred to him. Early on the morning of June 25th, Custer resumed his march. Up to that time the command was maneuvered as a whole. Now, however, it was divided into four detachments. One under Major Reno, consisting of three troops of cavalry and the Indian scouts, forty in number, held the advance; the second battalion, composed also of three troops, moved off some miles to the left of Reno, scouting the country to the southward; a third detachment, comprising the pack train which carried the reserve ammunition--some 24,000 rounds--was under the command of Captain McDougall, and had one troop as an escort; the fourth battalion was that under Custer himself, and was the largest, having five troops, and it marched parallel to Reno and within easy supporting distance to the north, the pack train following the trail in rear of Reno and Custer.