Precursors of the Kalmar Union

Timeline

1. 1333–1335Kalmar · SwedenMagnus Eriksson ruled Sweden and Norway as the same monarch; the two kingdoms kept their own laws and assemblies but shared a royal coat of arms and foreign policy, providing a precedent for the later model of one monarch with multiple national councils.
2. 1336Stockholm · SwedenMagnus married Blanche of Namur, using the Flemish-Namur noble network to strengthen the Nordic royal house's diplomatic capital in Europe and to establish dynastic legitimacy for heirs such as his son Håkon.
3. 1337–1340Øresund · Baltic SeaFacing Valdemar IV of Denmark's ambition to unite Scandinavia, Magnus tried to oppose him with a Swedish-Norwegian front and coordinated diplomatic positions toward the Hanseatic League; though Denmark was not incorporated, a logic of Nordic coordination was already visible.