Answer:
Steppe nomads would invade the settled communities to take control of pasture lands. Settled communities were in the fear of new or next invasion. The nomad's trade was not related to the gain but related to the goods provided themselves that they don't have that time Nomads were from two different cultures and districts.
Nomads speak a Turkic language. There were many nomads group who traveled on the silk road.
When blood doping, it creates more red blood cells which carry oxygen to generally create ATP so in that case there would be more oxygen absorbed by a athlete blood doping than a athlete that is not due to the fact of the increase of red blood cells.
I think it’s Normandy I’m not sure tho