The next four years showed an apparent stalemate. The Archdukes decided that before taking on the Republic it was important to subdue the last Protestant enclave on the Flemish coast, the port of Ostend. The siege took three years and eighty days. Meanwhile, the stadtholders mopped up some more Spanish fortresses, like Grave in Brabant and Sluys and Aardenburg in what was to become States Flanders. Though these victories deprived the Archdukes of much of the propaganda value of their own victory at Ostend, the loss of the city was a severe blow to the Republic, and it brought about another Protestant exodus to the North.