While the 1914 Christmas truces have a mythological status in British culture, intimate interactions with the enemy are, this interdisciplinary edited collection shows, a staple of modern warfare. Spanning multiple conflicts around the world, from the nineteenth century to the present Russia/Ukraine war, the chapters consider how fellow-feeling with the enemy during war has been both fueled and limited by constellations of class, gender, nationality, race, religion, sexuality, and shared experience. Scrutinizing asymmetries of power in enemy encounters, the instability of divisions between allies and enemies, and the heterogeneity of experiences within one army or side, contributors to this book confront a central question: how far is thinking of the enemy as an ‘equal’ in some way a precondition for non-violent interactions with them in war? In some cases, the ease of fraternization and reciprocity between the lines raises questions about the necessity of a clear feeling of enmity for fighting to continue, while in others, exclusionary attitudes based on racial or colonial hierarchies or the criminality of irregular warfare result in extreme violence and differential valuations of enemy lives.