"Antietam National Battlefield Maryland" by Frederick Herman Tilberg delves into the pivotal battle of Antietam, fought on September 17, 1862, which marked the bloodiest day of the American Civil War. The book explores how this crucial engagement halted Confederate General Lee's invasion of the North, significantly altering the war's trajectory and prompting President Abraham Lincoln to issue The Emancipation Proclamation. As a part of the Historical Handbook series from the U.S. National Park Service, this work not only provides historical insights but also emphasizes themes of sacrifice, freedom, and the enduring impact of war on society.