Civil War By hupp1121 Apr 6, 1862 Shiloh 23,746 casualties Aug 30, 1862 Second Manassas 22,180 casualties Sep 17, 1862 Antietam 22,717 casualties Dec 31, 1862 Stones River 23,515 casualties Apr 30, 1863 Chancellorsville 24,000 casualties May 18, 1863 Vicksburg 19,233 casualties Jul 1, 1863 GettysBurg 51,000 Casualties Sep 18, 1863 Chickamauga 34,624 casualties May 5, 1864 The Wilderness 29,800 casualties May 18, 1864 Spotsylvania 30,000 casualties