years spanning 1812 to 1848 By elliana.165569 Mar 8, 1821 Mexico becomes independent Mexico becomes independent May 15, 1822 Stephen F. Austin starts a colony on the lower Colorado River Nov 13, 1824 Mexico adopted a Republican Constitution and declared rights for all Mexicans Jun 17, 1830 Mexico banned further settlement by Americans Oct 24, 1835 Mexicans tried to remove a cannon from Gonzales, Texas Mar 2, 1836 Texans declared independence from Mexico Apr 21, 1836 Houston's troops attack Mexican troops saying,"Remember the Alamo!" Sep 15, 1840 Britain relized Texas was independent Mar 13, 1844 Texas and Mexico signed a peace treaty May 11, 1846 Britain and the US signed a peace treaty that gave the US all of Oregon Feb 19, 1848 Oregon becomes an organized US territory