A second expedition, led by Col. R. I. Dodge and Prof. W. P. Jenney, set out from Fort Laramie the next spring to explore and evaluate the gold deposits in the Black Hills. Miners also thronged the hills, and efforts to make them await negotiations with the Indians were only partly successful. Meanwhile, the Government did make an effort to buy the Black Hills from the Sioux; but the Indians, led by Chief Spotted Tail, set a justly high price on the area, which the Government refused to meet. Moreover, the wild bands of Sitting Bull and other chiefs refused to sell at any price and warned the whites to stay out. No longer restrained by the Army, the miners now swarmed into the hills, which became a powder keg. Ignoring existing treaties, the Government decided to force the wild Sioux onto their reservation, and when the order for them to come in was not instantly complied with, the Army prepared for action. A double enveloping campaign was planned, to be led by Gen. George Crook with troops based at Fort Laramie and Fort Fetterman, and by Gen. Alfred H. Terry with Custer’s Seventh Cavalry from Fort Abraham Lincoln and Col. John Gibbon’s command from Fort Ellis, Mont. In March, Crook marched north from Fort Fetterman, 80 miles northwest of Fort Laramie, with 12 companies of soldiers. His cavalry surprised a large village of Sioux and Cheyenne on the Little Powder River in Montana, but Crazy Horse rallied the Indians and forced the troops to retreat. Again in late May, Crook moved north with 20 companies of men plus 300 friendly Shoshones and Crows, and once more, on June 17, on the Rosebud, he was defeated by a great array of warriors led by Crazy Horse. Retreating to his supply camp, Crook again decided to send for reinforcements. Meanwhile, General Terry’s command had marched west from Fort Abraham Lincoln and met Colonel Gibbon’s detachment on the Yellowstone River. Again dividing his forces, Terry sent Custer and the entire Seventh Cavalry up the Rosebud River, while he and Gibbon, with 12 companies of infantry and four troops of cavalry, proceeded up the Bighorn River.