Khaljis did not conquer Afghanistan and did not have kingdoms and armies. They were simply settlers and had same life style as Afghans (sheep herders, nomads, etc). According to historians of Mahmud Ghaznavi times (Utbi and Gardezi), Khaljis were largely infidels before Sebuktagin.
Khaljis looked different from other Turks (who were Mongoloid) because they were White Huns ;
Mohammad Khwarazmi in Mafatih-ul-Alam (975 AD) says, "The Hayatila are a tribe of men who had enjoyed grandeur and possessed the country of Tukharistan ; the Turks called Khalukh , or Khalaj, are their descendants." (Hayatila is the Arabic and Persian name for the Hepthalites).
Tukharistan (ancient Bactria) was in present-day Northern Afghanistan between Hindu Kush mountain range and Amu Darya. In mid-fifth century AD, Tokharistan became the stronghold of Hephthalites. Byzantine historian of the 6th century , Prokopios, wrote about Hepthalites ; ," The Ephthalites are of the stock of the Huns in fact as well as in name; however they do not mingle with any of the Huns known to us......They are the only Huns who are white-skinned and their faces are not ugly" ......"their territory lies immediately lie immediately to the north of Persia , and their city, called Gorgo, is located near the Persian frontier"......"
