A Nation Divided: The United States and the Challenge of Secession Timeline Part 1 By wird_o 1787 The Confederation Congress Voted to Prohibit Slavery in Territories Northwest of the Ohio River 1831 Nat Turner Led a Failed But Bloody Revolt 1833 The 1833 Compromise (March) The standoff ended when South Carolina's legislature accepted the lower tariff. 1836 The House Passes a "Gag Rule" It banned the discussion of petitions regarding slavery.