"As they followed the Indians' trail, they did not grasp the full meaning of the fresh pony tracks that seemed to cross and re-cross it. In the last few days, 3,000 more Indians -- Lakotas, Arapahoes and Cheyennes -- had left the reservations to join Sitting Bull. His encampment now stretched out for three miles along the Greasy Grass, a gathering of more than six thousand Indians: eighteen hundred of them warriors."