August Valentine Kautz (January 5, 1828 – September 4, 1895) was a German-American soldier and Union Army cavalry officer during the American Civil War.
He was the author of several army manuals on duties and customs eventually adopted by the U.S.
Source: Library of Congress Prints and Photographs Division. Brady-Handy Photograph Collection. http://hdl.loc.gov/loc.pnp/cwpbh.00805. CALL NUMBER: LC-BH82- 625 A <P&P>[P&P] License: CC-PD-Mark