Antietam National Battlefield, Maryland This official National Parks Service Handbook describes the Civil War battle fought at Antietam National Battlefield, in Western Maryland, providing an authentic account of the conflict between the two great armies led by General Robert E. Lee and Major General George B. McClellan. Black and white photographs mark specific battle positions of infantry, artillery, and cavalry. This publication is filled with extraordinary photographs, drawings, and maps that draw the reader into the conflict and generate a real sense of what took place during the battle.