The Parthians were Dahae people and they are Scythians, until Aršak or Arsaces leader of the Parni unite the Dahae Clans from Suren, Karen, Espahbad, Naudar, and other Parthian noble families into the Parthian Confederacy. Parthians or Dahae live below the Amu-Darya River and around the grasslands of the Karakum or modern day Turkmenistan. As Parthia annexed Persia and Mesopotamia, Parthians began to settle in Iran and Mesopotamia but they have several Parthian Subkingdoms exist in Parthian Empire from Persis, Atropatene, Adiabene, Elymais, Characene, Suren(Indo-Parthian) and Armenia (although Armenia wasn't but eventually an Arsacid Dynasty emerged from Armenia). Parthians remained a powerful force during Abbassid Revolution, they join the Arabs, Persians and Turks to overthrow the Umayyad Caliphate and some Parthian noble families still manage to create several quasi Sassanid Dynasty during Islamic Caliphate until early Abbassid Caliphate.