The American Civil War was fought between the Union states (primarily from the North) and the Confederate states (primarily from the South) over a variety of issues, including states' rights, slavery, and economic and social differences. The war was marked by major battles, such as the Battle of Gettysburg and the Battle of Antietam, as well as numerous smaller skirmishes.
The Union was ultimately victorious, and slavery was abolished throughout the country with the passage of the 13th Amendment to the US Constitution. However, the war resulted in tremendous loss of life and devastation, with an estimated 620,000 soldiers dying on both sides. The aftermath of the war also had a significant impact on the political and social landscape of the United States, particularly with regard to issues of race and reconstruction.