The Battle of Gettysburg was won by the Union army (the North). Read more about the Battle of Gettysburg and its aftermath in the American Civil WarAmerican Civil WarConfederate States of America, also called Confederacy, in the American Civil War, the government of 11 Southern states that seceded from the Union in 1860–61, carrying on all the affairs of a separate government and conducting a major war until defeated in the spring of 1865.