From the ninth century BC on the co-effect of myriad factors such as natural conditions, population, society and specific geographic conditions, eventually led to a large-scale clash among these tribes and a grand westward migration.

• 从公元前九世纪开始,由于自然、人口、社会等多种因素的共同作用,以及欧亚草原地带的特定地理条件,促成了这批古代民族间的大规模碰撞,并由此而引发了自东而西的大范围迁徙。