September 17th, 2023
This date has been called America’s bloodiest day in recognition of the high casualties suffered in the Civil War battle between General Robert E. Lee’s Confederate forces and General George McClellan’s Union army. Estimates vary, but more than 25,000 Union and Confederate soldiers were killed or wounded in this battle on the banks of the Potomac River in Maryland.
Source: www.history.com/topics/american-civil-war/battle-of-antietam