Norway
Kalmar Union

Upon the death of King Haakon V in 1319, Magnus Eriksson, at just three years old, inherited the throne as King Magnus VII. A simultaneous movement to make Magnus King of Sweden proved successful (he was a grandson of King Magnus Ladulås of Sweden), and both the kings of Sweden and of Denmark were elected to the throne by their respective nobles. Thus Sweden and Norway were united under King Magnus VII.

In 1349, the Black Death killed between 50% and 60% of Norway's population and led to a period of social and economic decline. Although the death rate was comparable with the rest of Europe, economic recovery took much longer because of the small, scattered population. Even before the plague, the population was only about 500,000. After the plague, many farms lay idle while the population slowly increased. However, the few surviving farms' tenants found their bargaining positions with their landlords greatly strengthened.

King Magnus VII ruled Norway until 1350, when his son, Haakon, was placed on the throne as Haakon VI. In 1363, Haakon married Margaret, daughter of King Valdemar IV of Denmark. Upon the death of Haakon in 1379, his 10-year-old son Olaf IV acceded to the throne. As Olaf had already been elected to the throne of Denmark in 1376, Denmark and Norway entered a personal union. Olaf's mother and Haakon's widow, Queen Margaret, managed the foreign affairs of Denmark and Norway during Olaf's minority.

Margaret was on the verge of achieving a union of Sweden with Denmark and Norway when Olaf IV suddenly died. Denmark made Margaret temporary ruler on the death of Olaf. On 2 February 1388, Norway followed suit and crowned Margaret. Queen Margaret knew that her power would be more secure if she were able to find a king to rule in her place. She settled on Eric of Pomerania, grandson of her sister. Thus at an all-Scandinavian meeting held at Kalmar, Erik of Pomerania was crowned king of all three Scandinavian countries, bringing the thrones of Norway, Denmark, and Sweden under the control of Queen Margaret when the country entered into the Kalmar Union.
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