Unit 7 Timeline ( 16 - 18 ) By AponteClaribel Mar 6, 1820 Missouri Compromise Period: Apr 25, 1846 to Feb 2, 1848 Mexican War Feb 26, 1847 Battle of Buena Vista Feb 2, 1848 Treaty of Guadalupe Hidalgo Jan 24, 1849 California Gold Rush Jul 21, 1851 Australian Gold Rush