U.S. History By drich Nov 28, 1621 Pilgrims and Native Americans celebrate the first Thanksgiving feast Feb 3, 1776 United States becomes a country Feb 3, 1861 Civil War - 1861-1865 Dec 18, 1865 Slavery abolished in the United States Oct 29, 1929 Great Depression begins with the crash of the stock market. Nov 22, 1963 John F. Kennedy assasinated Apr 4, 1968 Martin Luther King Jr. is assasinated Jul 20, 1969 Apollo 11 lands on the moon Apr 12, 1981 The first space shuttle is launched Nov 4, 2009 First African American president Barak Obama becomes the first African American president