Robert J. McMahon is the Ralph D. Mershon Professor of History Emeritus at Ohio State University. The author of several books on U.S. foreign relations, the Cold War, and the Vietnam War, he previously taught at the University of Florida and has held visiting professorships at Williams College, the University of Virginia, University College Dublin, and the Free University (Berlin). McMahon served as president of the Society for Historians of American Foreign Relations in 2001.
