Key Dates of Slavery in North America By gracek 1700 Slavery was starting to be seen in North America. 1775 Establishment of the USA 1775 The War of Independence began in the USA 1777 Northern States of the USA Abandon Slavery and Introduce Legislations. 1783 The War of Independence finished in the USA 1789 The Constitution and The Bill of Rights are written. 1808 The Importation of Slaves into the USA was Declared Illegal. 1850 The Tension increased between the Northern and Southern States 1860 Abraham Lincoln was elected The President of the United States. 1861 The American Civil War began 1865 The American Civil War ends, as the South surrenders