The territory they lived on became part of Great Moravia in 875 (now mostly in the Czech Republic) and later, in 990, the first Polish state created by duke Mieszko I and then expanded by king Boleslaw I at the beginning of the 11th century.
[4] Before and during the migration period the territory of south west Poland - Silesia - was inhabited by various peoples.
Tacitus in his description of Magna Germania mentions Suevi: Marsigni, Osi, Gotini, Buri in what later became Silesia and Burgundiones and Lygii at the Vistula.
[5] However, during the migration period, those peoples had moved west and vacated territories in Central Europe.
Lands in the basins of Oder and Vistula were then taken by Polish tribes who repopulated these abandoned areas and created their own tribal organizations.