Jörg Nagler is Senior Professor of North American History at Friedrich Schiller University in Jena, Germany. He has written extensively on nineteenth and twentieth century U.S. history, with a particular focus on war and society, comparative and transnational history. His publications include On the Road to Total War: The American Civil War and the German Wars of Unification, 1861-1871 (co-edited with Stig Förster).Don H. Doyle is McCausland Professor of History at the University of South Carolina, USA. He is the author of The Cause of All Nations: An International History of the American Civil War and several other publications dealing with the US and the world during the nineteenth century. Marcus Gräser is Professor of Modern and Contemporary History at Johannes Kepler University in Linz, Austria, where he has taught since 2011. His main areas of interest are American and Central European History (in comparative perspective). He is presently preparing the volume on North America in the series "Neue Fischer Weltgeschichte".