CSA 11, 10¢ light blue used on pristine cover with manuscript cancel and “Official Business” at top right, addressed to Colonel J[acob] Schmitz, Cmdg 1st Regt. 31st Brigade, Texas State Troops. $200.

Col. Jacob Schmitz, commanded 1st Regiment, Comal County, 31st Brigade, Texas State Troops (TST) FRONTIER REGIMENT / FRONTIER ORGANIZATION (1861 - 1865): Throughout the Civil War, the Texas State legislature provided laws and appropriations to organize companies of men to provide frontier defense. These men were not part of the Confederate States Army but served under the command and control of officers in the employ of the State of Texas, although the organization of the troops was along military lines. The first of these groups was the Frontier Regiment, which existed from mid-1861 until December 1863 when the group was mustered into the CSA. They were replaced by the Frontier Organization, which was in existence until the end of the war in 1865. In the official State records these groups are often referred to as the Texas State Troops.