Civil War Monument, Cassopolis, Michigan
Today, September 17th. the bloodiest single day of the American Civil War, Antietam, or Sharpsburg. Tactically inconclusive, though considered a Federal strategic victory, it led to President Abraham Lincoln's announcement of the Emancipation Proclamation.
On September 22, 1862, Lincoln announced that he would issue a formal emancipation of all slaves in any state of the Confederate States of America that did not return to Union control by January 1, 1863. This effectively ended Confederate hopes of a European intervention.