Listen to 6. Unknown Soldier [Stories of the Danube] online. 6. Unknown Soldier [Stories of the Danube] is an English language song and is sung by Brno Philharmonic Orchestra, Burhan Ocal, Casper Richter, Zawinul Syndicate, Joe Zawinul, Amit Chatterjee, Arto Tuncboyaciyan and Walter Grassmann. 6. Unknown Soldier [Stories of the Danube], from the album Zawinul: Stories of the Danube, was released in the year 2007. The duration of the song is 10:25. Download English songs online from JioSaavn.