The event is free, open to the public, with plenty of free parking to include handicapped parking, with dozens of food and craft vendors.
Market at Washingtonburg attracted over 11,000 people in 2009.
The newest building on the AHEC campus will be open for tours and book sales and history lectures.
Friday will feature special educational tours for local school and youth organizations.
Saturday and Sunday highlights include 18th century field and Revolutionary War tactics demonstrations, and special presentations about the crafts that supported the Army and the people of Carlisle.
Examples of demonstrations include: the 18th century forge; French and Indian War field tactics, Revolutionary War field tactics. French and Indian War and Revolutionary War military units will portray the inhabitants of the post called "Washingtonburg."For more information and a schedule of events, call 717-245-3641 or visit the AHEC website at www.usahec.org