Cross the Potomac River with Robert E. Lee. Discover the "Lost Orders" with McClellan and fight the battles of South Mountain as you follow the roads the soldiers used during the 1862 Antietam Campaign. To begin your journey, click the Trails button on the homescreen and select Antietam Campaign Trail. Start at the Loudon Museum in Virginia to follow the campaign chronologically. For more information, pick up an Antietam Campaign Civil War Trail map guide at any Maryland welcome center or local visitor center, or visit www.civilwartrails.org.