Formation of the Kalmar Union

Timeline

1. 1387–1396Copenhagen · DenmarkBetween 1387 and 1389 Margaret I successively gained the regency of Denmark and Norway, and in 1389 defeated Albert, gaining actual control of Sweden. Over the following decade she integrated the nobles of the three realms by diplomatic and military means, paving the way for a formal union.
2. 1397Kalmar · SwedenNoble representatives of the three realms assembled at Kalmar, elected Eric of Pomerania (Margaret's nephew) as common heir to the three crowns, and confirmed Margaret as regent. The union treaty established common foreign and defense policy, while each realm retained its internal laws and traditional assemblies.