Sweden - the country's history

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During the 11th and 12th centuries, Sweden gradually became a unified Christian kingdom that later included what is today Finland. During the early Middle Ages, the Swedish state also expanded to control Norrland and Finland. Modern Sweden started out of the Kalmar Union formed in 1397 and by the unification of the country by King Gustav Vasa in the 16th century. Vasa fought for an independent Sweden and broke with the papacy, establishing the Lutheran Church in Sweden. In the 17th century Sweden expanded its territories to form the Swedish empire. Most of these conquered territories had to be given up during the 18th century. During the 17th century, after winning wars against Denmark, Russia, and Poland, Sweden emerged as a great power by taking direct control of the Baltic region. Sweden's role in the Thirty Years' War determined the political as well as the religious balance of power in Europe....