The Swedish minister in England demanded that assistance of William which had been stipulated in a late renewal of the ancient treaty between England and Sweden.

The states of Holland were solicited to the same purpose.
Accordingly, a fleet of thirty sail, English and Dutch, was sent to the Baltic under the command of sir George Rooke, who joined the Swedish squadron, and bombarded Copenhagen, to which the Danish fleet had retired.

At the same time the duke of Lunenbourg, with the Swedish forces which happened to be at Bremen, passed the Elhe, and marched to the assistance of the duke of Holstein.

The Danes immediately abandoned the siege of Tonninghen, and a body of Saxons, who had made an irruption into the territories of the duke of Brunswick, were obliged to retreat in disorder.

By the mediation of William, a negotiation was begun for a treaty between Sweden and Denmark, which in order to quicken, Charles the young king of Sweden made a descent upon the isle of Zealand.