Cooper Wingert is a PhD candidate in the History Department at Georgetown University. He is a historian of slavery, federalism, and state-building during the Civil War Era. His in-progress dissertation examines how wartime freedom seekers and Union army provost marshals navigated civil-military tensions and brokered emancipation in the field, and in the process renegotiated and reinvented federalism in the United States. His scholarship has been featured in the Journal of American History (June 2023) and Civil War History (September 2023). Wingert is also the author of several books including Slavery and the Underground Railroad in South Central Pennsylvania. Wingert currently serves as Assistant Director of the National Park Service project Slave Stampedes on the Southern Borderlands.