April 6, 1862

The Battle of Shiloh during the Civil War begins. It was the bloodiest battle in U.S. history up to that time. During the two-day battle, 23,746 men were killed, wounded, captured, or missing. This is more than the American casualties of the Revolutionary War, the War of 1812, and the Mexican War combined. The Battle of Gettysburg the following year would rank as the bloodiest battle of the war.