 De Ruyter took a liking to the Danish king, who later became a friend.In 1658, the States General, on the advice of a leading member, Cornelis de Graeff, one of the mayors of Amsterdam, decided to once again send a fleet to the Baltic Sea to protect the important Baltic trade and to aid the Danes against Swedish aggression, which had continued despite a peace settlement.In accordance with the States' balance-of-power political approach, a fleet under Lieutenant-Admiral Jacob van Wassenaer Obdam was sent without De Ruyter, who at the time was blockading Lisbon.