The Lilla Bogert Letters consist of six letters written by Charles Schofield from the field from 1876-1877. The 1876 letters were written while Schofield was on special assignment with the Second Cavalry. Schofield was with the "Montana Column" under Colonel John Gibbon on the 1876 Sioux Campaign. Colonel John Gibbon on the 1876 Sioux Campaign. Schofield tells Lilla of the conditions in the camps and his thoughts of Custer and other leaders, the Sioux, and the battle itself.
George Crook was a U.S. Army officer. The George Crook papers comprise letters concerning the Sioux campaign of 1876, the Apache campaigns of 1883 and 1886, the Sioux Commission, 1889, and the relocation of the Apache Indian reservation.