In the 9th century, the continued influx of nomads from the northern steppes brought a new group of people into Central Asia. These people were the Turks who lived in the great grasslands stretching from Mongolia to the Caspian Sea. Introduced mainly as slave soldiers to the Samanid Dynasty, these Turks served in the armies of all the states of the region, including the Abbasid army. In the late 10th century, as the Samanids began to lose control of Transoxiana (Mawarannahr) and northeastern Iran, some of these soldiers came to positions of power in the government of the region, and eventually established their own states, albeit highly Persianized. With the emergence of a Turkic ruling group in the region, other Turkic tribes began to migrate to Transoxiana.