This chapter addresses the three earliest constitutional lineages, in the USA, France and Poland. It shows how these constitutional forms were shaped by imperialism and how the intensification of military policies in the eighteenth century defined the patterns of citizenship that they developed. It also shows how, diversely, each constitutions established a polity with militarized features, so that the different between national and imperial rule was often slight. To explain this, it addresses Napoleonic constitutionalism in Fance and the tiered citizenship regimes that characterized the American Republic in the nineteenth century.