1824-Texas and Coahuila are organized as one of the states of the Mexican Federal Republic, now the single most important rival to U.S. dominance of North America. Thousands of Americans have already settled in this area.
1846 – General Taylor heads back to supply base at Point Isabel and ask the governors of Texas and Louisiana to send 5000 volunteers. The Mexicans cross the Rio Grande in force and lay siege to Fort Texas, under command of Major Jacob Brown.