Did the 17th century Spanish call the Netherlands Flanders?
The beginning of the movie is set in Flanders in 1622. They show a map of Flanders which include cities such as Gouda and Rotterdam, which definitely aren't part of Flanders and never have been. Breda also isn't a Flemish city, it is located in the Dutch province of North Brabant (there also is a province of Brabant in Belgium). The map doesn't show the political division of the Low Countries at the time.
In 1579 the Union of Atrecht (now known as Arras and currently located in Northern France) was formed, which became known as the Spanish Netherlands, which stayed loyal to Spain and comprises of the territory of the present-day Kingdom of Belgium. Flanders was part of the Spanish Netherlands.
As a response also in 1579 the Union of Utrecht was formed, which became de facto independent of Spain as the Republic of the United Provinces (the territory of which now forms the Kingdom of the Netherlands) two years later.
In 1648 the Peace of Munster (AKA the Peace of Westphalia, which also ended the 30 Year War in Germany) was signed which officially ended the Dutch War of Independence (also known as the Dutch Revolt and the Eighty Years War) and at which the Spanish recognized the independence of the Dutch Republic.
So I guess Hollywood movies aren't the only ones to muddle their history.
Anyways it's nice to see a movie based on the other side of this war which formed the basis of Dutch nationhood. I wish we Dutch made a movie about this period of history once (although Dutch film makers generally aren't interested in periods before the 20th century).