 Derby consolidated and reorganised for two weeks, left a large garrison in the town and moved north to the Anglo-Gascon stronghold of Mussidan in the Isle valley with 6,000–8,000 men.He then pushed west to Périgueux, the provincial capital of Périgord, taking several strongpoints on the way.Périgueux's defences were antiquated and derelict, but the size of the French force defending it prohibited an assault.