Events in the Mexican American War By ElizabethC Jan 1, 1821 stephen austin goes to mexico to press for texas statehood Jan 1, 1821 stephan austin moves 300 vfamlies to texas Feb 23, 1836 T he battle of the alamo Apr 21, 1836 Texas gains it independence Apr 21, 1836 Battle of San Jacinto Nov 5, 1844 James K. Polk is elected president Jun 1, 1845 zachary Taylor sends troop across the Nueces river May 11, 1846 Polk ask congress to declare war on Mexico Jun 14, 1846 The bear flag republic is delclared Jan 1, 1847 the treaty of guadalupe hidalho is written Mar 28, 1847 winfield scott captures Veracruz Sep 1, 1847 trist is sent to mexico to discuss terms to end the war Sep 13, 1847 Los niños heroes jump to their deaths rather than surrender Feb 2, 1848 Mexico city surrenders Mar 10, 1848 The U.S congress gets rid of Article Ten of the Treat of Guadalupe Hidalgo Mar 10, 1848 The treaty of Guadalupe Hidalgo is ratified Jan 1, 1849 henry david thoreau writes civil disobedience Jan 1, 1850 manuel armijo surrenders New Mexico Sep 9, 1850 stephen keearney accepts california for the u.s