The violence of colonial wars between 1890 and 1914 is often thought to have been uniquely shaped by the nature of each of the European empires. This book argues instead that these wars' extreme violence was part of a shared 'Colonial Way of War'. Through detailed study of British, German and Dutch colonial wars, Tom Menger reveals the transimperial connectivity of fin-de-siècle colonial violence, including practices of scorched earth and extermination, such as the Herero Genocide (1904-1908). He explores how shared thought and practices arose from exchanges and transfers between actors of different empires, both Europeans and non-Europeans. These transfers can be traced in military manuals and other literature, but most notably in the transimperial mobility of military attachés, regular soldiers, settlers or 'adventurers'. Pioneering in its scope, Menger's work re-thinks the supposed exceptionality of standout cases of colonial violence, and more broadly challenges conceptions we have of imperial connectivity.