Ersari appear to have been a major component of the Sayin Khan Turkmen tribal confederacy, whose Yurt (nomadic territory) in the 13-17th centuries stretched from the Balkan mountains to the Mangishlaq peninsula and north to the Emba river.

The label Sayin Khani, given to them by the other nomadic peoples around, referred to their emergence from the breakup of the Golden Horde, (founded by Genghis Khan's grandson Batu, known as the Sayin Khan), in order to differentiate their origins from tribes that came from the territories of Hulegu (Iran) or Chaghatay (Trans-Oxanian Central Asia).

The Sayin Khan Turkmens were an organized confederation of tribes thought to be divided, in typical Turco-Mongol fashion, into two parts, the Ichki (inner) and Tashki (outer) Oghuz.

Abu al-Ghazi Bahadur, the Khan of Khiva in the 17th century, in his book Shajara-i Tarākima ("The Genealogical Tree of the Turkmen", 1659) does not indicate whether the term Tashki refers to an organizational, military or purely geographical meaning.

Sometime in the 17th century, in part to the drying up of the western Uzboy channel of the Amu Darya, the Ersari and its major subtribes moved east to the banks of the main course of the Amudarya.

Most of them were members of the Imir, Dukur, Düker (Döger), Igdir, Chavuldur, Karkin, Salor or Agar (Ajar) tribes.

Two years later, in 1221, the Mongol conquest pushed the Oghuz tribes, including the Chowdur, from the Syr Darya region into the Kara Kum area and along the Caspian Sea.

[21] The full tribal structure of Turkmens is as follows: halk, il, taýpa, urug, kök, kowum, kabile, aýmak/oýmak, oba, bölük, bölüm, gandüşer, küde, depe, desse, lakam, top, birata, topar, and tire.

He also added that the Turkmen "put the principles of brotherhood, equality, and freedom into practice more completely and consistently than any of our contemporary European republics.

Besides guiding and regulating affairs between individuals, families and groups, elders, along with serdars, made important decisions on distribution of water, land or on declaring and waging war.

[28] Turkmen tribes recognized only their free will as the primary authority and were never loyal to any of the foreign powers that conquered their lands.

They always chose to rise and fight for their freedom, as evidenced in numerous battles and revolts against the neighboring Uzbek Khanates, Persian and Russian Empires.