📚 Sources
- Uppsala Conflict Data Program (UCDP)
- Correlates of War (CoW) project
- Official archives and academic literature
First engagement or skirmish of the Åland War, fought on May 19–20, 1854, between Finnish-Russian forces and British warships in the Vitsand and Lappohja areas on the shore of Pohjanpitäjänlahti bay