American Civil War
Definition: The American Civil War was a conflict in the United States between the Northern states (often called the Union) and the Southern states (often called the Confederacy) from 1861 to 1865. The main issues were slavery, states' rights, and economic differences.
In more advanced discussions, you might refer to specific battles, key figures, or the war's impact on modern America. - "The American Civil War had profound effects on the nation's economy and social structure."
Understanding the American Civil War is important for grasping the history and development of the United States.