Henry Marshall Elmore was a Colonel for the Confederate States Army and he commanded the 20th Texas Infantry during the American Civil War.
Following the advice of his brother who served in the Mexican–American War, Henry Marshall Elmore moved his own family to Texas in 1853.
[1] Although this brother Physic Rush Elmore suggested that he not settle until he was West of the Texan Colorado River, Henry M. Elmore stopped in the East Texas county of Walker, and was one of the founding fathers of Waverly, Texas, named for the Waverley novels of Sir Walter Scott.
The regiment was assigned to the Trans-Mississippi Department and was charged with defending the Texas coast from the Sabine River to Galveston.
Despite the fact that they did not see action outside of Texas, the 20th Infantry played an important part in the Confederate recapture of Galveston in January 1863.