From the mid-tenth to the mid-11th centuries, the Scandinavian

From the mid-tenth to the mid-11th centuries, the Scandinavian kingdoms were unified and Christianized, resulting in an end to Viking raids, and greater involvement in European politics. King Cnut of Denmark ruled over both England and Norway. After Cnut’s death in 1035, England and Norway were lost, and with the defeat of Valdemar II in 1227, Danish predominance in the region came to an end. Meanwhile, Norway extended its Atlantic possessions, ranging from Greenland to the Isle of Man, while Sweden, under Birger Jarl, built up a power base in the Baltic Sea. However, the Norwegian influence started to decline already in the same period, marked by the Treaty of Perth of 1266. Also, civil wars raged in Norway between 1130 and 1240.

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