At dawn on September 17, Maj. Gen. Joseph Hooker’s I Corps mounted a powerful assault on Lee’s left flank from the Joseph Poffenberger farm near the North Woods. 'The Cornfield' - The Battle of Antietam 17 September 1862 Last Sunday Myself and a few of the lads put out forces together and played 'The Cornfield' scenario … Antietam - Cornfield, 8:00-8:30am, September 17, 1862 American Battlefield Trust’s map of the Battle of Antietam At dawn on September 17, Maj. Gen. Joseph Hooker’s I Corps mounted a powerful assault on Lee’s left flank from the Joseph Poffenberger farm near the North Woods. American Battlefield Trust's map of the Battle of Antietam - Fight for the Cornfield. Confederate artillery on … Start studying The Battle of Antietam: September 1862. The Battle of Antietam (/ æ n ˈ t iː t əm /), also known as the Battle of Sharpsburg, particularly in the Southern United States, was a battle of the American Civil War, fought on September 17, 1862, between Confederate General Robert E. Lee's Army of Northern Virginia and Union General George B. McClellan's Army of the Potomac, near Sharpsburg, Maryland and Antietam Creek. Learn vocabulary, terms, and more with flashcards, games, and other study tools.