A game on the Battle of Antietam, September, 1862. System is loosely based on the area movement games from Avalon Hill (Storm Over Arnhem, Thunder at Cassino, Turning Point: Stalingrad and Breakout: Normandy). 22x34' map, 176 large die-cut counters, player-aid cards and rules. Game turns represent 2 hours, units are brigades. Sister game to They Met At Gettysburg. - BoardGameGeek