January 1, 1863: The Emancipation Proclamation goes into effect.
…And upon this act, sincerely believed to be an act of justice, warranted by the Constitution, upon military necessity, I invoke the considerate judgment of mankind, and the gracious favor of Almighty God.
In witness whereof, I have hereunto set my hand and caused the seal of the United States to be affixed.
Done at the City of Washington, this first day of January, in the year of our Lord one thousand eight hundred and sixty three, and of the Independence of the United States of America the eighty-seventh.
By the President: ABRAHAM LINCOLN
WILLIAM H. SEWARD, Secretary of State.