Action of 21 May 1565

The Action of 21 May 1565 was a naval battle in the Northern Seven Years' War, when the Swedes defeated the Danes.

On 21 May, eight Danish ship were found north of Pomerania. They were there to prevent Swedish ships getting to or from Greifswald. Four of the ships fled into Greifswald to escape the Swedes but they chose to burn the other four ships to prevent them falling into enemy hands.

Klas Horn planned to attack them inside the harbor, but after negotiations with the Duke of Pomerania, it was decided that the ships would be taken care of by the Duke on behalf of Sweden, pending a peace agreement, and their flags submitted to the Swedish admiral.