Postbellum
With the collapse of the Confederate States in 1865, Jackman and some of his men decided not to surrender and headed for Mexico. Along the way Jackman reunited with his now-released family in Shreveport, Louisiana, and proceeded with them toward Texas and the border. Near the end of 1865 they arrived in the city of San Marcos, located in Hays County, Texas. Jackman entered northern Mexico, leaving his family in Texas while he ascertained whether to relocate there. Deciding against it, he crossed back into the United States and surrendered to Federal authorities in San Antonio. Taken to New Orleans, Louisiana, took the loyalty oath to the U.S. Government, and was subsequently paroled.
During 1867 Jackman bought a ranch near Kyle, Texas, and settled his family there, farming and raising cattle. He and his wife helped found the First Christian Church, Disciples of Christ, and he later was a Blanco Chapel Free School trustee. His wife of 21 years, Martha, died in 1870. In 1873 Jackman won election as representative to the Fourteenth Texas Legislature. Jackman remarried in 1875 to Cass (Kyle) Gains, a widow, and they would have two sons and two daughters together.
On March 17, 1885, Jackman was appointed the U.S. Marshal for western Texas by U.S. President Grover Cleveland. He held this post until his death at his home in Kyle in June 1886. He is buried in the town's Kyle Cemetery.
Read more about this topic: Sidney D. Jackman