Name the U.S. war between the North and the South.

Why this is the answer

The war between the North and the South was the Civil War, fought from 1861 to 1865. It began when eleven Southern states left the United States and formed the Confederate States of America; slavery was at the center of the conflict. The North won when the South surrendered in April 1865. Memory hook: a civil war is a war within one country, and this one split it North against South.