Westward Expansion Timeline Assignment By Beth Rhee Period: Jan 1, 1750 to Dec 31, 1850 westward Jan 1, 1764 Texas annexed to U.S. Mar 14, 1794 Cotton Gin Jan 1, 1797 XYZ Affair Jan 1, 1798 XYZ Affair Jan 26, 1803 Louisiana Purchase no exact date stated Jan 1, 1818 Agreement of 49th Parallel Feb 21, 1819 Adams-Onis Treaty Feb 29, 1820 Missouri Compromise Jan 1, 1823 Monroe Doctrine May 28, 1830 Indian Removal Act/Trail of Tears Jun 26, 1832 Texas Claims Independence Feb 23, 1836 The Battle of the Alamo began Apr 21, 1836 Texas Claims Independence Jan 1, 1838 Trail of Tears Dec 31, 1839 Trail of Tears Jan 1, 1846 Mexican-American War Jan 1, 1848 California becomes a state Jan 1, 1848 Mexican-American War Feb 2, 1848 Treaty of Guadalupe Hidalgo Mar 6, 1850 The Battle of the Alamo ends Jan 1, 1853 Gadsden Purchase Jan 1, 1854 Gadsden Purchase May 30, 1854 Kansas-Nebraska Act
