The Finnish War ( sv, Finska kriget, russian: Финляндская война, fi, Suomen sota) was fought between the

Kingdom of Sweden Sweden, ; fi, Ruotsi; fit, Ruotti; se, Ruoŧŧa; smj, Svierik; sje, Sverji; sju, Sverje; sma, Sveerje or ; yi, שוועדן, Shvedn; rmu, Svedikko; rmf, Sveittiko. formally the Kingdom of Sweden, is a Nordic country located on t ...

and the

Russian Empire The Russian Empire was an empire and the final period of the List of Russian monarchs, Russian monarchy from 1721 to 1917, ruling across large parts of Eurasia. It succeeded the Tsardom of Russia following the Treaty of Nystad, which ended th ...

from 21 February 1808 to 17 September 1809 as part of the

Napoleonic Wars The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fren ...

. As a result of the war, the eastern third of Sweden was established as the autonomous

Grand Duchy of Finland The Grand Duchy of Finland ( fi, Suomen suuriruhtinaskunta; sv, Storfurstendömet Finland; russian: Великое княжество Финляндское, , all of which literally translate as Grand Principality of Finland) was the predecess ...

within the Russian Empire. Other notable effects were the

Swedish parliament The Riksdag (, ; also sv, riksdagen or ''Sveriges riksdag'' ) is the legislature and the supreme decision-making body of Sweden. Since 1971, the Riksdag has been a unicameral legislature with 349 members (), elected proportionally and s ...

's adoption of a new constitution and the establishment of the

House of Bernadotte The House of Bernadotte is the royal family of Sweden since its foundation there in 1818. It was also the royal family of Norway between 1818 and 1905. Its founder, Charles XIV John of Sweden, was born in Pau in southern France as Jean Bernado ...

, the new Swedish royal house, in 1818.

Background

After the Russian Emperor

Alexander I Alexander I may refer to: * Alexander I of Macedon, king of Macedon 495–454 BC * Alexander I of Epirus (370–331 BC), king of Epirus * Pope Alexander I (died 115), early bishop of Rome * Pope Alexander I of Alexandria (died 320s), patriarch of ...

concluded the 1807