The Treaty of Calmar

The Treaty of Calmar, signed in 1397, was an agreement that united Denmark, Sweden, and Norway under a single monarch, marking the beginning of the Kalmar Union. The goal was to strengthen these Nordic countries against external threats and promote stability and cooperation. It was named after the town of Kalmar in Sweden where the treaty was signed. Although it brought the kingdoms together, the union faced challenges and conflicts, particularly due to differences in governance and national interests, leading to its eventual dissolution in the early 16th century.