Besides, there also was no need for such a construction because in the Middle Ages there were a lot of small, scattered communities here.' Andrey Borodovsky said: 'All the impressive defensive lines in Eurasia were built in the period from the beginning of the first millennium BC up to the opening half of the first millennium AD.This is the era of late Bronze Age and early Iron Age, including the Hunnish time on the eve of the Great Migration of Nations.
The wall complex - now almost hidden to the naked eye - is believed to date from a long era that also saw such constructions as the Great Wall of China and Hadrian's Wall.
Concealed under thick layers of turf are huge stones put in place by ancient man, says the scientist.
Six rows of a parallel wall system limited access to the Altai Mountain complex from the north via the valley of the Katun River.
Such a fortification process was due to a number of factors.
First, the appearance of significant human resources in this era, thanks to the potential of an integrated manufacturing economy.