The American Civil War was known by many names at the time of the conflict. Those in the north call it the War of the Rebellion, the War of the Southern Rebellion, the War to Preserve the Union and the War to to Make Men Free. Those in the south referred to it as the War Between the States, the War Against Northern Aggression and the War of Northern Aggression. Some other terms used were the Brothers' War, the Lost Cause, the Late Unpleasantness, the War of Attempted Secession, the War Against the States and Mr Lincoln's War.
American Civil War page