What countries made up ancient Persia?
History of Iran
In 1864 until the early 20th century, another mass expulsion took place of Caucasian Muslims as a result of the Russian victory in the Caucasian War. Others simply voluntarily refused to live under Christian Russian rule, and thus disembarked for Turkey or Iran. These migrations once again, towards Iran, included masses of Caucasian Azerbaijanis, other Transcaucasian Muslims, as well as many North Caucasian Muslims, such as Circassians, Shia Lezgins and Laks.[145][148]
Many of these migrants would prove to play a pivotal role in further Iranian history, as they formed most of the ranks of the Persian Cossack Brigade, which was also to be established in the late 19th century.[149] The initial ranks of the brigade would be entirely composed of Circassians and other Caucasian Muhajirs.[149] This brigade would prove decisive in the following decades to come in Qajar history.