Union general (1816–1870) whose most decisive victory earned him the sobriquet ‘Rock of Chickamauga.’ Civil War–dated ALS signed “Geo. H. Thomas, Maj. Gen’l U. S. V.,” one page, 5 x 7.5, Chattanooga, February 11, 1863. Letter to a colonel. In part: “It is with much pleasure that I comply with your request to send you my autograph if it can be of any benefit to so charitable an institution as the Christian Commission.” In very good condition, with heavy staining along the upper border (not affecting any of the letter’s body). RR Auction COA.