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Mikkeli, city, southeastern Finland, northeast of Helsinki. Mikkeli received its town charter in 1838 and became the administrative capital of the province in 1843. It was the site of the Battle of the Porrassalmi Canal (1789), in which the Finns defeated a much larger Russian force. During World War II, Mikkeli served as a headquarters for Marshal Carl Gustaf Mannerheim, the commander-in-chief of the Finnish armed forces. The city is the seat of a Lutheran bishopric and has a regional museum and the Headquarters Museum. Local industry includes plywood milling and granite quarrying. Tourist activities centre on skiing. Pop. (2005 est.) 46,514.

This article was most recently revised and updated by Amy Tikkanen.
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