Battle of Kronstadt
1790 CE.
Shown on the map at 60.072°, 29.253°.
The Battle of Kronstadt (Russian: Красногорское сражение, lit. 'Battle of Krasnaya Gorka') was a naval battle fought in the Gulf of Finland west of Kronstadt on 3–4 June 1790. The Swedish naval forces sought to engage the Kronstadt squadron of Russian fleet and defeat them both to prevent Russian squadrons from joining and also to open the sea route to Kronstadt and Saint Petersburg.
Text from the Wikipedia article Battle of Kronstadt, licensed CC BY-SA 4.0.