Abstract
This chapter examines how the frontier and the changing fate of the region influenced the military system as well as the provincial administration and agrarian regime. It focuses on Vidin in the period of the wars which made it a frontier outpost again, being either directly occupied or under immediate threat. As in many other frontier areas, military activity affected relations between Muslims and Christians in the province and the town of Vidin. This chapter contributes to a better understanding of the complex impact of the wars during the expansion and contraction of the Ottoman state. The discussion is based mainly on documents from the series of kadi sicils, the records of the sharia court in the town, preserved from the last years of the seventeenth century onwards and kept in the Sofia National Library.