What is surprising with E-V13 is that it is as common in R1a-dominant as in R1b-dominant countries. R1a Indo-European tribes are associated with the Corded Ware culture, which spanned across Northeast Europe, Scandinavia and the northern half of Central Europe. R1b tribes invaded the Balkans, the southern half of Central Europe, and joined up with Corded Ware people in what is now Germany, the Czech Republic and western Poland. If E-V13 was found among both groups, it would have needed to be either assimilated in the Pontic Steppe or very near from it (say, in the Cucuteni-Trypillian culture, around western Ukraine, Moldova and Romania), or at the junction between the two groups in central Europe (e.g. around the Czech Republic).
The distribution and age of E-V13 clades in central and western Europe are consistent with a dispersal by Hallstatt and La Tène Celts, Italic tribes (including a Roman redistribution
