Treaty of Hamburg (1638)
The Treaty of Hamburg was signed in Hamburg on 5 March 1638 by Cardinal Richelieu of France and representatives of Queen Christina of Sweden. Richelieu had made the decision to enter into direct war against the Habsburgs and the Holy Roman Empire during August 1636. Based on the terms of the treaty, France paid Sweden 1,000,000 livres for its military contributions against the Habsburgs.
Moreover, the accord confirmed their alliance set by the tenets of the Treaty of Wismar which had been negotiated between France and Sweden in March 1636.
