Faculty at the Letterman Institute

George C. Wunderlich

Mr. Wunderlich has been the Executive Director of the National Museum of Civil War Medicine since November 15, 2002.  Mr. Wunderlich began his association with the Museum in October 2000 as the Director of Education.

In 1994, Mr. Wunderlich founded the Historical Education Center in St. Louis, Missouri.  The organization provided high-quality living history programs to schools, parks, civic organizations and professional associations.  He also assisted in the development of programs for the National Park Service and the St. Louis County Parks and Recreation Department.  These programs covered a wide variety of mid-nineteenth century military and civilian issues.  As a result of his efforts in public history, he was awarded the National Medal of Honor by the Daughters of the American Revolution. 

In 2005 Mr. Wunderlich developed a unique interpretive partnership, the first of its kind, with the National Park Service on the Antietam National Battlefield, which lead to the establishment of the Museum’s satellite site, the Pry House Field Hospital Museum.  He has also been associated with the Federal Office of Personnel Management as a presenter for the White House Fellows Program and has developed new historically-based training programs for the National Park Service, Joint Medical Executive Skills Institute (JMESI), the United States Army Medical Department (AMEDD) and other civilian and government organizations, leading numerous staff rides of both the Antietam and Gettysburg battlefields.  Additionally, he is an acting advisor for the Missouri Civil War Museum, the Center for the Study of Civil War Photography, The Friends of Historic Fort Davis National Historic Site and the National Civil War Museum. 

In 2009 Mr. Wunderlich lead the team that developed the Letterman Institute, an organization that has been tasked with the mission of using the Civil War medical story to assist military, government and civilian organizations in developing leadership skills, logistical understanding, managerial excellence and deep mission awareness.

Mr. Wunderlich has worked with Grenada Productions, the History Channel, National Geographic and the BBC, conducting a series of ballistic tests for several programs aired worldwide.  He has been on several programs dealing with ballistics, medicine, technology and historic musical instruments.

He is a nationally known speaker on various Civil War topics and can be regularly seen on the History Channel, A&E, PBS and the British Broadcasting Corporation. 


Betsy Estilow

Ms. Estilow currently serves as the president of the Board of Directors of the National Museum of Civil War Medicine and has been a museum docent and respected lecturer since the Museum’s founding.  She is one of the co-founders of the Conference on Women and the Civil War and has served as president of the Historical Society of Frederick County.  Ms. Estilow is a recently retired Professor of Biology and current Adjunct Lecturer in Civil War History at Hood College in Frederick, MD. She received a BS degree in biology from Albright College and a certification in medical technology from the University of Pennsylvania Medical Center.  After completing a Master of Science degree in Clinical Microbiology at West Virginia University, she became the director of the microbiology laboratory at Washington County Hospital in Hagerstown, MD.  In 1975, she joined the faculty at Hood College where she has taught a wide variety of courses ranging from introductory biology to biology of aging to pathogenic microbiology.  She developed and taught a weeklong course on Civil War History for Hood Elderhostel entitled, “In the Footsteps of the Blue and Gray.” Ms. Estilow is the recipient of the Mortar Board Excellence in Teaching Award, an award given by the students at Hood College. 


Thomas Frezza

Thomas Frezza had been working full time at the National Museum of Civil War Medicine since 2011, after being a part time employee since 2008.  After receiving his Bachelor’s at Unity College in Maine, studying Parks, Recreation, and Eco Tourism in 2008, Tom went to work for the National Park Service.  For three years he worked at the education office at Harpers Ferry National Historical Park, giving tours, working with thousands of school children and running large educational programs for both adults and children.  During that time, he was working on his Master’s in History at Shippensburg University, from which he graduated in 2010.

He is an member of the US Marine Corps Historical Company, which is a not-for-profit educational corporation structured and operated as a professional agency established to support the United States Marine Corps, and Marine Corps Heritage Foundation.  Their principle objective is to educate the public, and our fellow Marines in the history of the Corps, and function as a high profile public relations tool for the U.S. Marine Corps and Marine Corps Heritage Foundation.  Tom is also a member of the 5th New York, Duryee Zouaves, and has taken part in large living histories from Gettysburg down to Gaines Mill.

As Director of Training and Outreach Specialist, he has been training all of our incoming docents and staff, developing tours and programs, and giving tours to hundreds of visitors.  He has also been coordinating with the National Park Service on the Antietam Battlefield to coordinate programs and special events.  Tom has also been featured in many different filming projects for the museum, and for other outside agencies, as a historian or as a uniformed extra.  He looks forward to working with you all.


Frederick Patients after the Battle of Antietam

Search through our list below of patients that were treated in Frederick after the Battle of Antietam.