http://en.wikipedia.org/wiki/Kalmar_Union
The Kalmar Union (Danish, Norwegian, and Swedish: Kalmarunionen) is a historiographical term meaning a series of personal unions (1397–1523) that united the three kingdoms of Denmark, Norway (with Iceland, Greenland, Faroe Islands, Shetland, and Orkney), and Sweden (including Finland) under a single monarch, though intermittently and with a population less than 3,000,000.[1]
Kalmar union ca.1500
The land area is sort of inconvenient in shape, but I think I could manage with some creative insets and croppings. Parts of Germany (Mecklenburg, Schleswig) could be included maybe?
I have some vague ideas about the gameplay, where I thought to utilize losing conditions in some way. Perhaps major cities (capitals) and thrones of the respective countries could be used as starting positions/losing conditions.
Some more information:
The Swedes were not happy with the Danes' frequent wars on Schleswig, Holstein, Mecklenburg, and Pomerania, which were a disturbance to Swedish exports (notably iron) to the European continent. Furthermore, the centralization of government in Denmark raised suspicions. The Swedish Privy Council wanted to retain a fair degree of self-government. The unity of the union eroded in the 1430s, even to the point of armed rebellion (the Engelbrecht rebellion), leading to the expulsion of Danish forces from Sweden. Erik was deposed (1438–39) as the union king and was succeeded by the childless Christopher of Bavaria. In the power vacuum that arose following Christopher's death (1448), Sweden elected Charles VIII king with the intent to reestablish the union under a Swedish crown. Charles was elected king of Norway in the following year, but the counts of Holstein were more influential than the Swedes and the Norwegians together, and made the Danish Privy Council appoint Christian I of Oldenburg as king. During the next seven decades struggle for power and the wars between Sweden and Denmark would dominate the union.
After the briefly successful reconquest of Sweden by Christian II and the subsequent Stockholm bloodbath in 1520, the Swedes rose in yet another rebellion which ousted the Danish forces once again in 1521, though Stockholm did not surrender until the summer of 1523. While independence was being reclaimed, the election of King Gustav of the Vasa at Strängnäs on June 6, 1523, has been seen as a formal declaration of independence, and as the de facto end of a union that had lost all long-term support in Sweden. The day Gustav Vasa was hailed as King (he was not crowned until 1528 though) would become, in 1983, the National Day of Sweden.
The political situation of the time should also be featured in the map in some way. It seems to me there were various political conflicts at the time, mainly between Sweden and Denmark, and I think the Hanseatic league was also involved somehow... I admit, I'm still a bit fuzzy on the details, I only have superficial knowledge of the subject at the moment... so if anyone wants to contribute to the research and gameplay design it'd be most welcome.
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Then, as for some concerns: there's already a map of almost the same geographical area, and another in development. On the other hand, this is a very different subject, entirely different time period. Still, I wonder if there will be enough interest in a project like this? I certainly think this would have potential.