Compiled in the Bureau of Topographical Engineers of the War Department. Chiefly for Military purposes under the authority of Honorable J.B. Floyd, Secretary of War, 1860. 42 x 69 cm. Shows towns, wagon roads, explorers' routes, railroads, forts, etc., approx. from Albuquerque, N.M. to Fort Lane, Or. and from Fort Laramie, Wyo. to Los Angeles, Calif. "Corrections and additions in reference to railroads in California, etc., were made in January, 1862 ..." "The new military posts at Fort Bidwell, ... located from a map loaned ... January 16, 1866." "Atlas to accompany the official records of the Union and Confederate armies, 1861-1865. Plate CXX."--Upper margin. Atlas published by the Washington Government Printing Office in 1891-95. Relief shown by hachures. "Julius Bien & Co. Lith. N.Y." Includes text and list of authorities. Inset: March routes of Army of the Tennessee from Savannah, Ga., to Columbia, S.C., 1865, accompanying the report of Maj. Gen O.O. Howard, U.S. Army, series I, vol. XLVII, part I. Includes bibliographical references. Washington Territory is shown prior to becoming Washington state. The geographic region of Southwest is referred to as the New Southwest. Original publisher: Govt. Print. Off..