The three sieges of Kolberg determined Russian control of Prussia's last major Baltic port during the Seven Years' War.
Key Facts
- Number of sieges
- Three (1758, 1760, 1761)
- Final siege duration
- August to December 1761
- Second siege dates
- 26 August – 18 September 1760
- Swedish involvement
- Auxiliaries supported Russia in 1760 and 1761
- Outcome reversed by
- Peter III made peace and returned Kolberg to Prussia
By the Numbers
Location
Cause → Event → Consequence
During the Seven Years' War, Russia sought to weaken Brandenburg-Prussia by capturing key strategic positions in Pomerania. Kolberg, as Prussia's last major Baltic port, was a high-value military and logistical target. Russian forces launched repeated efforts to take the town, supported in later attempts by Swedish auxiliaries allied against Prussia.
Russian forces besieged the Prussian-held town of Kolberg three times: an initial attempt in late 1758, a second unsuccessful siege from 26 August to 18 September 1760, and a final successful siege lasting from August to December 1761. In the 1760 and 1761 sieges, Swedish auxiliaries reinforced the Russian effort.
The fall of Kolberg cost Prussia its last major Baltic port and allowed Russian forces to establish winter quarters in Pomerania, a significant strategic gain. However, the death of Empress Elizabeth of Russia shortly afterward led her successor Peter III to make peace with Prussia and return Kolberg, nullifying the Russian gains.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
2 belligerents