http://en.wikipedia.org/wiki/Kalmar_UnionThe Kalmar Union (Danish, Norwegian and Swedish: Kalmarunionen; Latin: Unio Calmariensis) is a historiographical term describing a series of personal unions (1397–1523) that intermittently joined under a single monarch the three kingdoms of
Denmark, Sweden (then including Finland), and
Norway (then including Iceland, Greenland, the Faroe Islands and, prior to their transfer to Scotland in 1471, Shetland and Orkney).