I have not at any point said that 'Norway was under Danish rule' during the Viking Age (except in the time during and just before Canute the Great). I have said that it was effectively under Danish rule AFTER 1387 and that the two countries were closely tied during the Viking Age, with Danish influence in Norway being very visible. The Kalmar Union was indeed enacted late during this time but, as has been stated earlier, was more of a military and economic pact than anything else. After Sweden left the Kalmar Union, Denmark still was master of Norway. There was no rebellion in Norway after the Swedes left. Also, I assume the provinces you are referring to are Skåne, Halland and Blekinge, which had always been a part of Denmark, and didn't become Swedish until Carl X Gustav conquered them in 1658. This is all true, and doesn't take away from my points.