 Seven Slavic tribes

The Seven Slavic tribes or the Seven Slavic clans (, "Sedemte slavyanski plemena", or , "Sedemte roda") were a union of tribes in the Danubian Plain, that was established around the middle of the 7th century and took part in the formation of the First Bulgarian Empire together with the Bulgars in 680−681.Since its establishment it faced attacks of the Byzantine Empire.