Final answer:
Santa Anna agreed to three key promises in the Treaties of Velasco: not to fight against Texans, to push for recognition of Texas's independence by Mexico, and to accept the Rio Grande as Texas's southwestern border. However, these promises were not upheld by the Mexican Congress after Santa Anna was deposed.
Step-by-step explanation:
The student asked about the promises Santa Anna had to agree to in the Treaties of Velasco. General Antonio Lopez de Santa Anna signed the Treaties of Velasco, which included several significant promises as conditions for his release and the recognition of Texas's independence after being captured during the Texas Revolution. Although there were public and secret provisions in the treaties, three prominent promises Santa Anna agreed to were:
- He would not take up arms again against the Texan settlers.
- He would work towards the official recognition of Texas's independence by the Mexican government.
- He agreed that the Rio Grande would serve as the southwestern border of Texas.
However, since Santa Anna was deposed from power upon his return to Mexico, the Mexican Congress did not recognize these treaties as binding. The Congress refused Santa Anna's promises and persisted in its claim that Texas remained part of Mexico's territory.