The First Treaty of Brömsebro was agreed upon in September 1541. It was an agreement between the two arch enemies Denmark-Norway and Sweden

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

. The kings of the two countries, Christian III

Christian III of Denmark

Christian III reigned as king of Denmark and Norway. He was the eldest son of King Frederick I and Anna of Brandenburg.-Childhood:...

 and Gustav I

Gustav I of Sweden

Gustav I of Sweden, born Gustav Eriksson of the Vasa noble family and later known simply as Gustav Vasa , was King of Sweden from 1523 until his death....

 respectively, took part of the negotiations that took place in Brömsebro

Brömsebro

Brömsebro is a bimunicipal locality situated in Karlskrona Municipality, Blekinge County and Torsås Municipality, Kalmar County in south-west Sweden with 213 inhabitants in 2005....

, a village on the border between the countries. The treaty would run for 50 years and with the treaty, Denmark-Norway and Sweden agreed upon a joined attitude against the Hanseatic League

Hanseatic League

The Hanseatic League was an economic alliance of trading cities and their merchant guilds that dominated trade along the coast of Northern Europe...

. The parties also committed to providing support when the other country was attacked by domestic or foreign enemies, which meant that Danish troops, for example, helped the Swedish king Gustav to suppress a peasant uprising (the Dacke War

Dacke War

Dackefejden was a peasant uprising led by Nils Dacke in Småland, Sweden, in 1542 against the rule of Gustav Vasa. Dacke and his followers were dissatisfied with the heavy burden of the taxes, the introduction of lutheranism and the confiscations of the churches property...

) the following years.