A Day in September: The Battle of Antietam and the World It Left Behind - Hardcoverby Stephen Budiansky (Author) The Battle of Antietam, which took place on September 17, 1862, remains the single bloodiest day in America's history: more than 3,600 men died in twelve hours of savage fighting, and more than 17,000 were wounded. As a turning point in the Civil War, the narrow Union victory is well known as the key catalyst for Lincoln to issue his Emancipation Proclamation. Yet Antietam was not only a battle that dramatically changed