Timeline of the American History By facebooker_1207083516 Aug 3, 1492 Columbus discovers America Period: Aug 3, 1492 to Nov 4, 2008 Timeline of events in American history Feb 7, 1619 Abolition of slavery The aboliton of slavery was in 1619. The exact date couldn't be found. Dec 21, 1620 The pilgrim ship Mayflower arrives in America Jul 4, 1776 The Declaration of Independence Apr 12, 1861 The Civil War breaks out Oct 7, 1929 The Wall Street Crash Dec 7, 1941 Japan attacks pearl Harbour Dec 1, 1955 Rosa Parks refuses to give up her seat in a bus Nov 22, 1963 Assassination of Kennedy