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Sluis(slois), municipality, Zeeland prov., SW Netherlands, on the Scheldt estuary, near the Belgian border. Sluis was founded in the 13th cent. and later accorded trading privileges to the Hanseatic LeagueHanseatic League
, mercantile league of medieval German towns. It was amorphous in character; its origin cannot be dated exactly. Originally a Hansa was a company of merchants trading with foreign lands.
..... Click the link for more information. . In 1340, Edward III of England defeated the fleet of Philip VI of France off nearby Terneuzen in the first important engagement of the Hundred Years WarHundred Years War,
1337–1453, conflict between England and France. Causes
Its basic cause was a dynastic quarrel that originated when the conquest of England by William of Normandy created a state lying on both sides of the English Channel. In the 14th cent.
..... Click the link for more information. . Sluis fell to the Spanish in 1587 and was recovered by the Dutch in 1604. It subsequently lost importance as a port. It is also known by its French name, L'Écluse. The Dutch name was formerly spelled Sluys.