Before the Civil War, Texas did have a provision of dividing into five states in it's annexation treaty with the United States. This was done to placate certain Texans that were livid that Texas had to give up lands that now include parts of Wyoming, Colorado,Kansas,Oklahoma and New Mexico. This all changed when seccession happened. The provision was eliminated when Texas rejoined the Union in 1876. The only provision from the annexation treaty that remains is that the Texas flag can fly equal to or higher than the United States flag.