Correspondence, letterbooks, telegrams, memoir, speeches, reports, orders, financial records, scrapbooks, and other papers relating primarily to the Civil War, Reconstruction, Mexican border disputes, Indian wars, and Sheridan's service as commanding general of the U.S. Army.

Civil War material relates to cavalry operations, the Appomattox, Shenandoah, and Tullahoma campaigns, the Winchester Raid, and engagements at Boonville, Chickamauga, Missionary Ridge, Perryville, Ripley, and Stone River. Also includes material on George A. Forsyth's Europe-Asia tour (1875-1876), the Piegan Expedition (1869-1870), Gouverneur K. Warren's court of inquiry (1881), Rebecca M. Bonsal's service as Union spy at Winchester, Va., reconnaissance of the Bighorn Mountains and the Bighorn and Yellowstone river valleys (1877), and Henry Page's service as quartermaster of the Army of the Potomac (1863-1865). Correspondents include George A. Forsyth, James W. Forsyth, Ulysses S. Grant, Abraham Lincoln, Michael V. Sheridan, and William T. Sherman.