Following the Arab confrontation, the region was made part of Khorasan with its seat of power in Herat in the west. The Arabs later partially relinquished some of their territorial control though reasserted its authority approximately 50 years later in 750 when the Abbasid caliphs replaced the Ummayads. By then, many Arabs increasingly blended with locals as the Arabic identity in the region began to undergo a significant change. Arab contingents settled throughout various parts of present-day Afghanistan including the Wardak, Logar, Kabul, Balkh and in the Sulaiman Mountains. Over time they adopted local customs and languages, some became Persianized while others became Afghanized who followed Pashtunwali. Khalid being subsequently superseded, became apprehensive of returning to Arabia by the route of Persia, on account of the enemies he had in that country, and equally so of remaining in Kabul, under his successor. He retired, therefore, with his family, and a number of Arab retainers, into the Sooli-many mountains, situated between Mooltan and Pishawur, where he took up his residence, and gave his daughter in marriage to one of the Afghan chiefs, who had become a proselyte to Maho-medism. From this marriage many children were born, among whom were two sons famous in history. The one Lody, the other Soor; who each, subsequently, became head of the tribes which to this day bear their name.