Contrary to stereotypes that represent it primarily as an expression of machismo or romantic chivalry, military honour in early modern England was professional, moral, utilitarian, and a force for social stability. It was pragmatic as well as idealistic. It shared attributes of civilian honour but also comprehended rules and obligations specific to soldiers. Professional honour required that the soldier should know and observe the codes and practices of his métier. To do so satisfied his internal sense of personal integrity and brought external reputation. Honour also had a broader social value. Mutuality and utility marked its operation in the English civil war. This mutuality safeguarded practices both sides found useful, such as prisoner exchanges, for the honour of each side was engaged in observance of the relevant rules. The survival of a bipartisan soldiers' honour ameliorated relations between enemies. It helped to prevent irrevocable social divisions, to sustain social order, and to enable previously warring Englishmen to live together with tolerable equanimity.