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It was Norway.
This is the story of Harald Fairhair in the late 9th century. Harald inherited one of a number of petty kingdoms west of modern Oslo. He proposed marriage to Gyda, the daughter of King Erik of a nearby kingdom of similar size. She wanted to be queen of Norway, so she refused to marry anyone who was not king of "all" Norway.
She had created a monster, because Harald took an oath not to cut his hair until he won her. He went to war and conquered several other Norwegian kingdoms, making him the strongest king in Norway. Finally, the remaining Norwegian kings, including Gyda's own father, Erik, banded together against him for self-protection. Harald won the resulting battle of Hafrsfjord in which Erik was killed. He then sent for Gyda, who conceded that he had met the conditions, and married him.