How did the Texas Rangers contribute to the civil war

After Texas seceded from the United States in 1861 during the American Civil War, many Rangers enlisted individually to fight for the Confederacy, such as Walter P. Lane, George W. Baylor, Thomas S. Lubbock, Benjamin McCulloch, Henry Eustace McCulloch, John B. Jones, Leander H. McNelly and John Ford. Although the famous Eighth Texas Cavalry regiment was widely known as Terry's Texas Rangers, neither its leader and founder, Benjamin Franklin Terry, nor the majority of its members had been affiliated