Oh...and one last thing...
The Republic of Texas included half of present day New Mexico, a slice of present day Oklahoma, about a third of Colorado including the western slope of the Rocky's extending about 50 miles into southern Wyoming covering nearly 400,000...making The Republic of Texas the size of California, Arizona and Nevada combined. sqm.
During the "deal-making" with Uncle Sam to be admitted to the Union, the US wanted to set the Borders smaller than present day Texas and to take the other land. After some serious negotiating with them damn Yankees, the Texicans backed them off and settled for the present day borders but with a number of interesting concessions...one of which is that the Texas State Flag is the only State Flag that can be flown at the same height as the US Flag...and that's a fact, Jack.