Gordon Granger (November 6, 1821 – January 10, 1876) was a career U.S. Army officer and a Union general during the American Civil War, where he distinguished himself at the Battle of Chickamauga. Granger is best remembered for his part in the Battle of Chickamauga and the Battle of Chattanooga and for issuing General Order No. 3 on June 19, 1865, in Galveston, Texas, further informing residents of, and enforcing, Abraham Lincoln's Emancipation Proclamation which set all Confederate states' slaves free on January 1, 1863. June 19 is now commemorated by the federal holiday of Juneteenth.