

The Achaemenids were the dominant dynasty during Greek history until the time of Alexander the Great, and the use of the name Persia was gradually extended by the Greeks and other peoples to apply to the whole Iranian plateau. During the rule of the Persian Achaemenian dynasty (559–330 bc), the ancient Greeks first encountered the inhabitants of Persis on the Iranian plateau, when the Achaemenids-natives of Persis-were expanding their political sphere.

The first mention of Parsa occurs in the annals of Shalmanesar II, an Assyrian king, in 844 bc. Parsa was the name of an Indo-European nomadic people who migrated into the region about 1000 bc. The term Persia was used for centuries, chiefly in the West, to designate those regions where Persian language and culture predominated, but it more correctly refers to a region of southern Iran formerly known as Persis, alternatively as Pārs or Parsa, modern Fārs.

