Question: The Achaemenid Empire was the known enemy of what nation's histories during its existence?
Sentence: In Greek history, the Achaemenid Empire is considered as the antagonist of the Greek city states, for the emancipation of slaves including the Jewish exiles in Babylon, building infrastructures such as road and postal systems, and the use of an official language, the Imperial Aramaic, throughout its territories.
Answer in sentence: yes