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Once in England a slave is free
Sir John Holt, Lord Chief Justice of England, rules that "as soon as a Negro comes into England, he becomes free. One may be a villein in England, but not a slave."
http://en.wikipedia.org/wiki/John_Holt_%28Lord_Chief_Justice%29#mediaviewer/File:Sir_John_Holt_by_Richard_Van_Bleeck.jpg -
Atlantic slave trade abolished
Britain's rebellious North American Colonies ban or suspend the Atlantic slave trade.
http://macquirelatory.com/Trans%20Atlantic%20Slave%20Trade.htm -
slavery unconstitutional
Massachusetts Supreme Judicial Court rules slavery unconstitutional, a decision based on the 1780 Massachusetts constitution. All slaves are immediately freed.
: Massachusetts Supreme Judicial Court rules slavery unconstitutional, a decision based on the 1780 Massachusetts constitution. All slaves are immediately freed. -
Northwest Ordinance
The United States in Congress Assembled passed the Northwest Ordinance of 1787, outlawing any new slavery in the Northwest Territories.
http://en.wikipedia.org/wiki/Northwest_Ordinance -
The Slave trade act
The United States bans American ships from the trade and prohibits export by foreign ships in the Slave Trade Act.
http://en.wikipedia.org/wiki/Slave_Trade_Act_of_1794 -
International slave trade is a felony
The US makes international slave trade a felony in Act Prohibiting Importation of Slaves; this act takes effect on 1 January 1808
http://southernnationalist.com/blog/2010/12/15/yankee-slave-traders-of-new-england/triangular-trade/ -
Civil war comes to an end
general lee surenders to general grant at the appomatox court house.
http://en.wikipedia.org/wiki/Battle_of_Appomattox_Court_House