Key Facts
- Date
- 9–10 July 1790
- Location
- Gulf of Finland, near present-day Kotka
- Result
- Decisive Swedish victory
- Significance
- Largest naval battle ever fought in the Baltic Sea
- War ended
- Russo-Swedish War (1788–1790)
Strategic Narrative Overview
The war saw a series of naval and land engagements in the Baltic and Gulf of Finland. After inconclusive earlier battles, the Swedish fleet under Duke Karl assembled a large inshore squadron near Svensksund. On 9–10 July 1790, the Swedes launched a coordinated assault on the Russian fleet, exploiting favorable winds and superior tactical positioning to shatter the opposing force.
01 / The Origins
The Russo-Swedish War of 1788–1790 arose from Swedish King Gustav III's ambition to reclaim territories lost to Russia in earlier conflicts and to exploit Russia's simultaneous war with the Ottoman Empire. Sweden launched an offensive against Russia, seeking to reverse the territorial losses suffered in the Great Northern War and restore Swedish dominance in the Baltic region.
03 / The Outcome
The Swedish victory at Svensksund was decisive: the Russian fleet suffered catastrophic losses, compelling Russia to negotiate. The resulting Treaty of Värälä (1790) ended the war with no territorial changes, restoring the pre-war status quo. Sweden nonetheless claimed a significant moral and strategic victory, halting Russian pressure on its eastern flank.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.