Sam Houston chose his moment.
We are approaching San Jacinto Day (April 21st).
Yes, Remember the Alamo, but more important, Remember San Jacinto. 18 minutes that made a Great Nation.
Yes, but it was the sacrifice of the men at the Alamo that damaged Santa Anna's army to the point that it made San Jacinto possible. Also, remember Goliad, another wipe out that made the Alamo defenders know what was coming.