Battle of Frisches Haff

Infobox Military Conflict
name=Slaget vid Das Frisches Haff
partof=Seven Years' War


caption=
place=Vistula Lagoon
date=September 10, 1759
result=Swedish victory
combatant1=flag|Sweden
combatant2=flag|Prussia
strength1=2,250
strength2=700
casualties1=27 killed and wounded
casualties2=70-80 killed, 600 capturedThe battle of Frisches Haff was a naval battle between Sweden and Prussia that took place September 10, 1759 in the Vistula Lagoon ( _de. Frisches Haff), as part of the ongoing Seven Years' War. Swedish naval forces consisting of 28 vessels and 2,250 men under Captain Lieutenant Carl Rutensparre destroyed a Prussian force of 13 vessels and 700 men under Wilhelm von Carpelan.

The consequence of the battle was that the small fleet Prussia had at its disposal ceased to exist. The loss of naval supremacy meant also that the Prussian positions at Usedom and Wollin became untenable and were occupied by Swedish troops.