In what way was the tang military in china similar to that of islamic forces?

The Tang military in China and that of Islamic forces both relied upon pastoral nomadic soldiers from the Inner Afro-Eurasian steppes. The many trans-ecological exchanges mediated by the Silk Roads linked all regions of the Afro-Eurasian landmass, from its agrarian civilizations to its many stateless communities of woodland foragers and steppe pastoralists, into a single system of exchanges that is several millennia old.

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.