From the Middle Ages, the English market was the main customer of clarets from Bordeaux, France, helped by the Plantagenet kingdom, which included England and large provinces in France. In the 18th century, the Methuen Treaty of 1703 imposed high duties on French wine. This led to the English becoming a main consumer of sweet fortified wines like sherry, port wine, and Madeira wine from Spain and Portugal. Fortified wine became popular because unlike regular wine, it did not spoil after the long journey from Portugal to England.