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Finnish War

The last Russo-Swedish war, begun by Russia as Napoleon’s ally after Tilsit. It ended with the Treaty of Fredrikshamn, under which Finland became part of Russia as the Grand Duchy of Finland.

Date
9 (21) February 1808 – 5 (17) September 1809exact date · duration: ≈ 2 yearsJulian calendar (Old Style); the Gregorian date (New Style) is in brackets
Place
Finlandapproximate locationtoday: Finland · Western and Central Europe
Participants
Russian Empire, Kingdom of Sweden, Alexander I, Michael Andreas Barclay de Tolly, Pyotr Bagration
Threads
Russia at the turn of the 19th century
Also known as
Финляндская война

On 9 (21) February 1808 Russian troops crossed the border river Kymijoki and within a few weeks occupied southern Finland; in the spring the fortress of Sveaborg capitulated. In March 1809 the war spread to Swedish territory: Bagration’s corps crossed the ice to occupy the Åland Islands, and Barclay de Tolly’s troops crossed the frozen Gulf of Bothnia by way of the Kvarken to Umeå.

After a coup d’état in Stockholm, Sweden signed the peace at Fredrikshamn on 5 (17) September 1809.

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Connections

Causes and preconditions

  • Treaties of Tilsit25 June (7 July) 1807 · Western and Central EuropeAlliance with France against Sweden

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Sources

  1. Wikipedia (English): Finnish War
  2. Wikipedia (Russian): Русско-шведская война (1808—1809)
  3. Wikidata: Q736268