Sieges were central to the evolution of customary laws of war in early modern Europe and represented the most regularised form of warfare. They were also where civilians were most at risk of exposure to the violence of conventional war, including the phenomenon of sack. A besieging force that stormed a town had the right to put the garrison to the sword and to sack the town. Yet the long tradition of sack has been neglected by historians, only now emerging as a subject of study in its own right. This chapter explores the history of sieges, sack, and the laws of war in Western Europe over the course of the long eighteenth century (1660–1815). It highlights sieges as an important but relatively neglected place for examining changes and continuities in customary laws of war, ideals of barbarity and civility, and moral sentiment over the long eighteenth century.

Giovanni Villani, in his chronicle, reports that, in 1117, Pisa and Florence formed a military alliance. Pisa asked for protection against Lucca, while their troops were busy in Mallorca besieging a Saracen stronghold (Figure 4.1).1 The safeguard from Lucca meant a Florentine military presence right at the doorstep of their neighbors, the problematic nature of which did not escape the attention of the author. Villani explains at length the measures taken by the Florentine army to avoid any potential attack on women in Pisa while their men were away.