War was a regular feature and, at times, a dominant characteristic of international relations between the Peace of Westphalia in 1648 and the beginning of monarchical Europe’s struggle with Revolutionary France in 1792. At least until the Enlightenment, contemporaries viewed it not merely as an acceptable way of pursuing international rivalries, but as a more normal and natural state of affairs than peace. Periods of open conflict, during which diplomatic representatives would usually be withdrawn, were assumed to be inevitable and, indeed, were frequently the anticipated outcome of the policies adopted by rulers and their advisers. The eighteenth century was significantly more pacific than its seventeenth-century predecessor had been, though in turn much more bellicose than its nineteenth-century successor. According to one calculation, the European ‘great powers’ were engaged in warfare for eighty-eight years of the century 1600–1700, sixty-four years from 1700–1800, and twenty-four years from 1800–1900. During the shorter period between 1700 and 1790, Russia was at war at some point during all nine decades; Austria, France, and Britain during eight; Spain and Sweden during seven; Prussia during six; and the Ottoman Empire during five: figures which underline the ubiquity of armed struggle even during the less bellicose eighteenth century.