Battle of Someri
1942 CE.
Shown on the map at 60.207°, 27.643°.
The Battle of Someri took place in the Gulf of Finland during World War II on 8–9 July 1942, between the Soviet Union and Finland. Starting as a modest operation to clear a Finnish observation post from a small island, it became one of the largest surface ship engagements in the Baltic theater.
Text from the Wikipedia article Battle of Someri, licensed CC BY-SA 4.0.