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 Fredericksburg The Battle of Fredericksburg was fought December 11–15, 1862, in and around Fredericksburg, Virginia, between General Robert E. Lee's Confederate Army of Northern Virginia and the Union Army of the Potomac, commanded by Major General Ambrose Burnside, as part of the American Civil War. The Union Army's futile frontal attacks on December 13 against entrenched Confederate defenders on the heights behind the city are remembered as one of the most one-sided battles of the war, with Union casualties more than three times as heavy as those suffered by the Confederates. A visitor to the battlefield described the battle to U.S. President Abraham Lincoln as a "butchery."
Second Battle of Auburn The Second Battle of Auburn was fought on October 14, 1863, in Fauquier County, Virginia, between Union and Confederate forces in the American Civil War. Confederate forces led by Lt. Gen. Richard S. Ewell led a sortie to extricate Maj. Gen. J.E.B. Stuart's cavalry command, trapped between two Union columns and clashed with the rearguard of the Federal II Corps under Brig. Gen. Gouverneur K. Warren. Stuart was successfully extricated but the Federal wagon train avoided Confederate capture in the inconclusive fight.