The general meaning here was, most likely, as follows. The ancient Aryans used these swampy lands to obtain ore, when the ore was depleted, the settlements were burned, the ditches were filled in. Therefore, the settlements existed for about 100—200 years. The main thing was to keep the secret of the technologies (know-how) for the manufacture of various metal products using metallurgy techniques, so that other tribes would not find out about it and would not leave the competition.
According to one hypothesis, the ancient Aryans made a gigantic migration from the South Ural steppes through Southern Ukraine, the Balkan Peninsula to Mycenae, and then to Iran and India. It is possible that they brought to Mycenae and Asia Minor the culture of horse breeding, previously unknown there, the art of making and using war chariots. The oldest chariot found in the world is from the Arkaim culture (dated to 2026 BC).
Russian scientists have solved the mystery of the mysterious figurines of ancient warriors found about 10 years ago near a river in the Chelyabinsk region. This was reported by the press service of the South Ural State University. The figurines were found in the Kunashak district near the village of Karino and their origin remained a mystery for a long time. Two figurines covered with a green coating represented warriors with a bird on their shoulder. They were sent for study. It turned out that they were made of pure copper. The scientists published a joint work in which they compared the artifacts with other similar figurines found in the Southern Urals. During the study, they found many similarities. The images of faces, quivers, and daggers have something in common with the images found further south – on Ustyurt in Kazakhstan. Probably, the figurines personified fallen warriors – bogatyrs, representatives of the semi-nomadic Gorokhov culture. In addition, according to experts, the warrior figurines have something in common with the traditions of Iranian culture, that is, Indo-European.
The growth of population and climate change have a huge impact on the movement of peoples. The appearance of more and more new people sooner or later leads to a reduction in the resources of a given territory and forces many to leave their homes in search of living space. People moved to other places also because the climate became colder or drier.