In the early 17th century the northern edge of Flanders formed the frontier between Spain and the United Provinces in the 80 Years War. In 1604 Prince Maurice captured the important fortresses of Sluis and Aardenburg, which lay in a strategic location to the south of the Scheldt estuary.
map & text: www.fortified-places.com
see also: staats spaanse linies

STAATS SPAANSE LINIES Wallenroute, 4525 RETRANCHEMENT
geodata 51.344760862249856,   3.38503360748291 postalcode 4525 Tags Staats Spaanse Linies, Retranchement, Zwin, Zeeuws-Vlaanderen