Катю́ша (Katyusha) is a Russian wartime song composed in 1938 by Matvei Blanter with lyrics from Mikhail Isakovsky. Written just before World War II, the song depicts a girl longing for her fighting military husband. The song quickly became popular throughout the USSR. Its first official performance was by Valentina Batishcheva in the Column Hall of Moscow's House of the Unions. Later it was performed by the Red Army Choir and other singers. In Girls und Panzer, this song is used for Pravda Girls High School.