 They disappeared after Totila's defeat in the Gothic War (535-554).It is assumed that Burgundians, Goths and Gepids with parts of the Rugians left Pomerania during the late Roman Age, and that during the migration period, remnants of Rugians, Vistula Veneti, Vidivarii and other, Germanic tribes remained and formed units that were later Slavicized.The Vidivarii themselves are described by Jordanes in his Getica as a melting pot of tribes who in the mid-6th century lived at the lower Vistula.