Thanks!
Both Balts and Slavs were known for building wooden forts or earthworks at unstable times or as means of defence against nomadic steppe tribes.
20-30 years ago it was assumed that Slavs originated from Zarubintsy-Kiev cultures (the so called Godlowski hypothesis). However, in the past 10 year new archeological evidence concerning the Przeworsk and Zarunbintsy cultures instigated a new debate. There is some evidence which might suggest origins in the Pommeranian culture. Late Przeworsk settlements survive as far as VII century AD in Grosspoles. On the same area the lechitic Sukow-Szeligi culture forms in late V early VI century, expanding into Vorpommern. The material culture of late Przeworsk and Sukow-Szeligi is very similar and many modern scholars suggest some form of continuity. Also other Slavic cultures like Feldberg and Tornow, closely resemble cultures from Poland in antiquity. There are striking differencec between these cultures and the larges Slavic culture of Prague-Korchak. At the same time, Ukrainian and Russian scholars (Siedow, Tretiakow, Baran, Pobol, Oblomski, Terpilovski and many others) established in the past 20 years that Kiev culture descends directly from Zarubintsy, while Zarubintsy from the Pommeranian. This is also supported by some Lithuanian scholars (like Petrauskas and Gimbutas).
Now... it might be possible that Slavic-Scandinavian contacts reach as far as antiquity and arrival of Goths, Vandals, Gepids in Pomerania, and the Chernyakov culture. In any case, contacts between Scandinavia and Pomeranian Slavs have always been intense. Apparently, whole Southern coast of Baltic, from Jutland to Truso was littered with Scandinavian emporia, so it is not astonishing that some Slavs could settle in Scania or some other place. Also Danish and Obodrite elites intermarried. Harald Bluetooth forged an anti-Saxon alliance with the duke of the Obodrites, marrying his daughter.
Few more links:
http://www.uppakra.se/docs/uppakra7/19_Helgess_U7.pdf
http://viking.hgo.se/Newsletter/NEWS5.pdf
It is worth noting that the firth king of Poland, Boleslaw I the Brave (967 – 1025) was called "Rex Gothorum et Polonarum"... most likely a distant reflection of former the Gothic-Venedic coexistence.
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