Rump Parliament retirement to declare his support for Monck, Army support for Monck became almost unanimous. Monck entered London in February 1660 and he allowed the Presbyterian members, 'secluded' in Pride's Purge of 1648, to re-enter parliament on 21 February 1660 on the condition that the restored Long Parliament would agree to dissolve themselves once general elections had been held. The "Long Parliament" dissolved itself on 16 March 1660, after preparing legislation for the Convention Parliament that formally invited King Charles II to be the English monarch in what has become known as the Restoration (of the House of Stuart). Rump Parliament
Treaty of Copenhagen (1660) had already agreed with England that preventing the western and eastern shore of Øresund from being controlled by the same country would in turn prevent future raises of the Øresund toll, which would cause disruption in the Dutch and English Baltic trade. In addition, Cardinal Mazarin threatened a French invasion of the Netherlands if it were to assist Denmark against Sweden. When learning of Charles' death in February 1660, Frederick immediately proclaimed the Treaty of Roskilde null and void. This caused great alarm to the Swedish mediators, but their French and English counterparts assured them that if Sweden were to