It is argued that they lived there until the Antes were attacked by the Pannonian Avars in 560, and the polity was finally destroyed in 602 by the same Avars. This resulted with breaking Croatian tribal unity into several groups, in Prykarpattia (Western Ukraine), in Silesia and the lower course of the Vistula river (Lesser Poland), and Eastern Czech Republic. The early Croats' migration to Dalmatia (during the reign of Heraclius 610-641) can thus be seen as a continuation of the previous war between the Antes and Avars. In a similar fashion, in his synthesis of works on Early Croats, regardless of Iranian or Slavic etymology of their name, Henryk Łowmiański concluded that the tribe was formed by the end of the 3rd and not later than the 5th century in Lesser Poland, during the peak of the Huns and their leader Attila.