Civil War Battles By mgulian Period: Jan 1, 1861 to Jul 3, 1863 Major Battles of the First Half of the American Civil War Apr 12, 1861 Battle of Fort Sumter Jul 21, 1861 First Battle of Bull Run Aug 10, 1861 Battle of Wilson's Creek Feb 11, 1862 Battle of Fort Donelson Mar 6, 1862 Battle of Pea Ridge Apr 6, 1862 Battle of Shiloh Sep 17, 1862 Battle of Antietam Dec 13, 1862 Battle of Fredericksburg Apr 30, 1863 Battle of Chancellorsville Jul 1, 1863 Battle of Gettysburg