|The American Civil War was a war fought in the United States from 1861 to 1865. The war broke out in April 1861, when southern forces attacked Fort Sumter in South Carolina. The loyalists of the Union in the North proclaimed support for the Constitution.
The states that remained loyal to the U.S. were known as the Union. The Union and Confederacy quickly raised volunteer and conscription armies that fought mostly in the South over the course of four years. Intense combat left 620,000 to 750,000 people dead.
The Union finally won the war when General Robert E. Lee surrendered to General Ulysses S. Grant at the Battle of Appomattox Court House.