Seven Years' War: After a four-month siege, Russian forces captured Kolberg, the last major Prussian port on the Baltic Sea.

The Seven Years' War, 1756 to 1763, was a Great Power conflict fought primarily in Europe, with significant subsidiary campaigns in North America and South Asia. The warring states were Great Britain and Prussia fighting against France and Austria, the respective coalitions receiving assistance from countries including Portugal, Spain, Saxony, Sweden, and Russia. Related conflicts include the Third Silesian War, French and Indian War, Third Carnatic War, Anglo-Spanish War (1762–1763), and Spanish–Portuguese War.

During the Seven Years' War, the Prussian-held town of Kolberg in Brandenburg-Prussian Pomerania was besieged by Russian forces three times. The first two sieges, in late 1758 and from 26 August to 18 September 1760, were unsuccessful. A final and successful siege took place from August to December 1761. In the sieges of 1760 and 1761, the Russian forces were supported by Swedish auxiliaries.

Kołobrzeg is a port and spa city in the West Pomeranian Voivodeship in north-western Poland, with about 47,000 inhabitants. Kołobrzeg is located on the Parsęta River on the south coast of the Baltic Sea. It is the capital of Kołobrzeg County.

The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North and Central European Plain regions. It is the world's largest brackish water basin.