The Blockade of Stralsund occurs during the Seven Years' War when a Prussian force invests the Swedish garrison of Stralsund, the capital of Swedish Pomerania.
Rather than lay formal siege to the port, the Prussians cut it off by land and blockade it.
They are unable to cut it off by sea, owing to a lack of a Prussian fleet, and eventually the blockade is abandoned when the bulk of Prussian forces are withdrawn to fight in other theaters.