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 Wassaw Sound The Battle of Wassaw Sound (or the Capture of the CSS "Atlanta") was an American Civil War naval battle between the Confederate ram CSS "Atlanta" and the "Passaic"-class ironclad monitors USS "Weehawken" and USS "Nahant" and the gunboat USS "Cimmerone" (later named "Cimmaron"), which took place on 17 June 1863 in Wassaw Sound, a bay in the present day state of Georgia. "Atlanta" ran aground while attempting to break the Union blockade, and after a short battle surrendered to the Union forces. Captain Rodgers became a national hero, and he was promoted to Commodore and received the Thanks of Congress as a result of his decisive victory.