Which of the serious defeats for the Union came first in the American Civil War: the Battle of Chickamauga or the Battle of Fredericksburg?
Battle of Chickamauga The Battle of Chickamauga, fought on September 18–20, 1863 between Union and Confederate forces in the American Civil War, marked the end of a Union offensive in southeastern Tennessee and northwestern Georgia — the Chickamauga Campaign. It was the first major battle of the war fought in Georgia, the most significant Union defeat in the Western Theater, and involved the second-highest number of casualties after the Battle of Gettysburg.
Battle of Sailor's Creek The Battle of Sailor's Creek (also known in whole or in part as Sayler's Creek, Little Sailor's Creek, Harper's Farm, Marshall's Cross Roads, Hillsman Farm, Double Bridges, or Lockett's Farm) was fought on April 6, 1865, near Farmville, Virginia, as part of the Appomattox Campaign, near the end of the American Civil War. It was the largest battle of the Appomattox Campaign and the last major engagement between the Confederate Army of Northern Virginia and local Richmond area defense forces commanded by General Robert E. Lee and the Union Army (Army of the Shenandoah, Army of the Potomac and Army of the James) under the overall direction of Union General-in-Chief Lieutenant General Ulysses S. Grant before Lee's surrender of his army to Grant at Appomattox Court House three days later.