Unit 7 time line By edwinlima96 Dec 22, 1793 Whitney's cotton gin transforms southern economy Dec 22, 1800 Gabriel slave rebellion in Virginia Dec 22, 1808 Congress outlaws slave trade Dec 22, 1820 Missouri Compromise Dec 22, 1829 Appel to the Colored Citizens of the world published Dec 22, 1831 Garrison begins publishing The Liberator Dec 22, 1836 House of representatives passes "Gag Resolution" Dec 22, 1840 Antislavery Liberity party organized Dec 22, 1845 U.S. annexes Texas Period: Dec 22, 1846 to Dec 22, 1848 Mexican-american war Dec 22, 1848 Treaty of Guadalupe Hidalgo Dec 22, 1849 California Gold Rush Dec 22, 1854 Republican party organized