<prompt> Bhala ukuqhubeka kwalesi sigaba - Umngcele wazuzwa njengefa emngceleni wakudala wasePheresiya-USSR, owathatha kakhulu isimo sawo samanje ngekhulu le-19 ngemuva kokunqotshwa kweRussia e-Central Asia  <response>: nokuhlanganiswa kwayo neKhanate yaseKokand kanye ne-Emirate yaseBukhara ngo-1865-68. Ngo - 1869 iPheresiya neRussia bavumelana ngokuthi umfula i - Atrek wawuzoba umngcele phakathi kwabo. Lo mngcele waqinisekiswa wabe eselulwa ngasempumalanga waya endaweni eseduze ne-Ashgabat ngo-1881 kulandela ukuqhubekela phambili kwamaRashiya emazweni aseTurkmenistan, wabe eseya emngceleni wase-Afghanistan ngo-1893; ukuhlukaniswa okuhlukahlukene kwalomngcele kwenzeka eminyakeni elandelayo. Okunye ukuguqulwa okuncane kwenziwa esikhathini sika-1954-57 lapho i-Iran ne-USSR njengoba kwakunjalo manje bavuma ukucacisa ngokucacile umngcele wabo ovamile, kufaka phakathi isifunda se-Atrek delta esasishintshile kusukela lapho ngenxa yokuncipha koLwandle iCaspian. 