When looking at the early modern period (c. 1500–c. 1800), we often speak of "the military" or "the army". But what exactly do we mean when using these terms? The forms and structures of the armed forces have not only changed between 1500 and 1800, but also varied throughout different regions of the world and even within Europe. The contributors to this volume examine twelve early modern examples of armed forces in the Holy Roman Empire, Western and Eastern Europe, Eastern Asia and North America and paint a multifarious and even disparate picture during this period. The findings suggest that modern notions of the armed forces common in the early modern period should be used more prudently to avoid prevalent implications of non-existing continuity and uniformity.