He teaches and lectures broadly on the political, military, cultural, and diplomatic history of the twentieth-century United States. He is the author of Beyond the Bonus March and GI Bill: How Veteran Politics Shaped the New Deal Era (2010) and the editor of Veterans' Policies, Veterans' Politics: New Perspectives on Veterans in the Modern United States (2012). He is currently working on a monograph entitled "Comrades in Arms: Veterans Organizations and the Politics of National Security in the American Century."