The area around the Black Sea was both a melting pot and launching pad for many of the developing haplogroups. Central Asia has the highest number of haplogroups present today (total of 12), and provided a launching pad for the R haplogroup. The R haplogroup migrated northward [North Asia = 8%], southward [South Asia = 41%], and eastward [East Asia = 2%], while maintaining Central Asia at 31%. To the south was also the Middle East at 21%, and north Africa at 6%. [These percents represent the present haplogroup in each geographic area.]
For my JONES DNA it is the western migration that represents the movement of my Y-chromosome...to central Europe, most likely along the Danube River, to central Germany. Europe is presently represented by 45% of the R haplogroup. Around this same time R1 is thought to have emerged and somewhat later, R1b. [R1 at around 30,000years ago and R1b around 25,000 years ago.]
It is of interest that the Proto-Indo-European languages are traced to this Central Asia location. An article appearing in U.S. News and World Report, Nov.5, 1990 described how modern speech evolved from a single, ancient source. Anatolia is thought to have been this geographic location which is part of Central Asia. This was determined before most of the present DNA and genetic research had been accomplished. What a deal! Two different fields, linguists and genetics, some 10 years apart, coming to the same conclusions. [One of the first linguist was Sir William Jones, 1786!]
Now around 2000 B.C., the native Anatolian peoples are believed to have been the Hittites, Hurrians, and Mitannians. The Hittite Old Kingdom (ca. 1750 - 1550 B.C.) are believed to have sacked Babylon, ending the dynasty of Hammurabi. This Hittite Society has been termed "feudal". They pioneered construction of the light, horse-drawn chariot, with spoked wheels. This of course would require a lot of horses. They are also believed to have developed scale-armour, and one of the first people to accomplish the manipulation of iron ore. It is these folks that seem to be the root of my Celtic DNA.