Battle of Antietam By facebooker_1799050132 Aug 28, 1862 Second Battle Of Bull Run begins Sep 1, 1862 Battle Of Chantilly Sep 4, 1862 Gen Lee's army begins toward the Potomac Sep 7, 1862 Union army is over Potomac and into Rockville, MD Sep 11, 1862 Confederates enter Hagerstown,MD Sep 14, 1862 Batte of South Mountain Sep 16, 1862 The night before Union and Confed troops make meet in Sharpsburg. Sep 17, 1862 BATTLE OF ANTIETAM fighting begins at dawn and continues for 12 hours until 5:30 pm Sep 18, 1862 Lee begins to retreat Sep 20, 1862 Battle of Shepherdstown Sep 22, 1862 PRELIMINARY Emancipation Proclamation Nov 5, 1862 Lincoln fires McClellan Dec 13, 1862 Battle of Fredricksburg Jan 1, 1863 Final Emancipation Proclamation