>>7619715Poles are slaves that tried to settle around danube but got their asses handed to them by the vlachs and were forced to flee to vistula
source:chronic of Nestor, kievan rus
>Among these same Slavs are included the White Croats, 3 the Serbs, and the Carinthians. For when the Vlakhs attacked the Danubian Slavs, setled among them, and did them violence, the latter came and made their homes by the Vistula, and were then called Lyakhs. Of these same Lyakhs some were called Polyanians, some Lutichians, some Mazovians, and still others Pomorians.>Almost at its beginning, the Povest' introduces the problem of the original and prehistorical habitat of the Slavs, preserving the tradition that “for many years the Slavs had their abode by the Danube, where the Hungarian and the Bulgarian land now lies.” From this locality, the Povest' represents them as expanding into the valley of the Bo- hemian Morava, and after attacks by the Vlakhs, it is likewise asserted that the Slavs moved north into the Vistula basin.Again it is mentioned how the vlachs btfo the poles and forced them to flee to vistula
Source here
https://archive.org/stream/TheRussianPrimaryChronicle/the%20russian%20primary%20chronicle_djvu.txtSearch for Vlak mentions
https://en.wikipedia.org/wiki/Lach_(name) 
