Säkkijärven polkka
Säkkijärven polkka ("the Säkkijärvi polka"), also called the "Karelian-Finnish Polka," is a well-known folk tune from Finland, popular with Finnish accordionists to the extent that it can be called their national anthem. It was especially popularized by Viljo "Vili" Vesterinen (1907–1961). The tune was first recorded in Säkkijärvi (now Kondratyevo in the Leningrad Oblast, Russia), and the words sometimes sung to the tune point out that Säkkijärvi itself might have been lost, but that Finns could at least keep the polka.
Military use
During the Continuation War, the Finnish Army discovered that the retreating Soviets had scattered radio-controlled mines throughout the re-captured city of Viipuri. These mines were set off when a three-note chord was played on the frequency the radio was tuned to, causing three tuning forks (of which each mine had a unique combination) to vibrate at once. Once the Army and Yleisradio experts discovered how the mines worked, an Yleisradio mobile transmitter was brought to Viipuri, and Vesterinen's recording of the polka was played on the same frequencies the mines used. The song was played continuously for about 1,500 times in the beginning of September 1941, after which alternative equipment was used to continue the radio jamming operation until 2 February 1942.
Other
Säkkijärven polkka is also the title of the eponymous film directed by Viljo Salminen (1908–1992) in 1955.
The Leningrad Cowboys play the song in the 1989 movie Leningrad Cowboys Go America. An additional mambo rendition is played during the end credits and included in the soundtrack album.
An electronic version of the song, titled Hardcore of the North, appears in the music video game In The Groove, commercial multi player machine dance game IDance and iDance2.
The music was featured in the movie Girls und Panzer der Film.