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BATTLE // February 15, 1918

Invasion of Åland

Overview

The Invasion of Åland was a 1918 military campaign of World War I in Åland, Finland. The islands, still hosting Soviet Russian troops, were first invaded by Sweden in late February and then by the German Empire in early March. The conflict was also related to the Finnish Civil War including minor fighting between the Finnish Whites and the Finnish Reds.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Invasion of Åland in 1918 brought the archipelago into the overlapping crises of both the Finnish Civil War and the wider World War I. Soviet Russian troops were present on the islands when Sweden intervened in late February, followed by German forces in early March, making Åland a point of direct competition between these outside powers at a moment when Finland's internal White-Red conflict was also producing minor fighting there. The convergence of Swedish, German, and Soviet Russian interests in the same island chain reflected the broader struggle over the Baltic littoral as the Russian Empire's collapse created a power vacuum across the region. The episode illustrated how the Finnish Civil War could not be fully separated from the international contest playing out simultaneously across northern Europe.

Forces & casualties

Troop strength

  • Soviet Russia2,000
    medium
  • Central Powers1,360
    medium

Soviet Russia fielded a 1.5 : 1 numerical advantage

Commanders (10)

Central Powers

Soviet Russia

Sweden

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Related

6 sibling battles · 4 factions

Last verified June 2026
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