The Thirteenth Amendment to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865. The amendment was ratified by the required number of states on December 6, 1865. Wikipedia
The group that benefited the most from gaining independence from Mexico are the Tejanos who were the former Americans and has now become the American citizens and had claimed for the American rights and privileges.
