Secession: The act of formally withdrawing from a union or organization. Southern states seceded from the Union to form their own government during the Civil War.
Battle of Gettysburg: A significant turning point in the war where Confederate forces were defeated. It marked a major victory for Union forces and is considered one of the bloodiest battles in U.S history.
Appomattox Court House: The location where General Robert E. Lee surrendered to General Ulysses S. Grant, effectively ending the Civil War.