“On September 22, 1862, President Abraham Lincoln issues a preliminary Emancipation Proclamation, which sets a date for the freedom of more than 3 million enslaved in the United States and recasts the Civil War as a fight against slavery….
“The proclamation was a presidential order and not a law passed by Congress, so Lincoln then pushed for an antislavery amendment to the U.S. Constitution to ensure its permanence. With the passage of the 13th Amendment in 1865, slavery was eliminated throughout America (although blacks would face another century of struggle before they truly began to gain equal rights).
“Lincoln’s handwritten draft of the final Emancipation Proclamation was destroyed in the Chicago Fire of 1871. Today, the original official version of the document is housed in the National Archives in Washington, D.C.”
From: https://www.history.com/this-day-in-history