The first recorded unified polity of Slavic tribes (Bohemian, proto-Slovak, Sorb, and other West Slavic groups), founded under the Frankish merchant-turned-king Samo; start date disputed between 623/624 and c. 626-631.
Dissolved after Samo's death in 658 (or 659) — his sons did not retain the kingly title, and the tribal union broke apart with no clear succession.
Scholarly survey of early Slavic expansion covering the Antes, Sclaveni, and their successors.