The Maryland Campaign represented Gen. Robert E. Lee's first invasion of the North. Opposing Lee was Gen. George B. McClellan, who had just retreated from Lee's onslaught during the Seven Days Battles. While Lee and McClellan fought a preliminary battle at South Mountain, and would engage again at Shepherdstown as the Confederate Army withdrew across the Potomac, the full force of both armies would meet at Antietam, and the subsequent battle would prove to be the bloodiest single-day battle of the war. Decisions of the Maryland Campaign introduces readers to critical decisions made by Confederate and Federal commanders throughout the campaign. Michael S. Lang examines the decisions that prefigured the action and shaped the contest as it unfolded. Complete with maps and a guided tour, this book is Lang's second contribution and the thirteenth in a series of books that will explore the critical decisions of major campaigns and battles of the Civil War"--