Awarded to the author of the best monograph or edited volume in the history of U.S. foreign relations, immigration history, or military history:

2020 Kara Dixon Vuic (Texas Christian University), for The Girls Next Door: Bringing the Home Front to the Front Lines (Harvard University Press, 2019)

2019 Aaron Sheehan Dean (Louisiana State University), for The Calculus of Violence: How Americans Fought the Civil War (Harvard University Press, 2019)