Atropates (*Ātr̥pātah and Middle Persian ; Ἀτροπάτης ; c. 370 BC - after 321 BC) was a Persian nobleman who served Darius III, then Alexander the Great, and eventually founded an independent kingdom and dynasty that was named after him. Diodorus (18.4) refers to him as (Ἀτράπης), while Quintus Curtius (8.3.17) erroneously names him 'Arsaces'. Towards the end of the Achaemenid Empire, Atropates was governor (satrap) of the Achaemenid province of Media. In the decisive Battle of Gaugamela (October 331 BCE) between Darius and Alexander, Atropates commanded the Achaemenid troops of Media and Sacasene. Following his defeat in that battle, Darius fled to the Median capital of Ecbatana, where Atropates gave him hospitality. Darius attempted to raise a new army but was forced to flee Ecbatana in June 330 BCE. After Darius' death a month later at the hands of Bessus, Atropates surrendered to Alexander. Alexander initially chose Oxydates as satrap of Media, but in 328-327 BCE after a period of two years Alexander lost trust in Oxydates' loyalty, and Atropates was reinstated to his old position. In 325-324, Atropates delivered Baryaxes (a sought-after rebel of the region) to Alexander while the latter was at Pasargadae. Alexander's esteem for the governor rose so high that soon afterwards Atropates' daughter was married to Alexander's confidant and cavalry commander Perdiccas at the famous mass wedding at Susa in February 324 BCE. Later that year, Alexander visited Atropates in Ecbatana with his good friend and second-in-command Hephaestion, who fell ill and died in October 324 BCE. At this time, "[i]t was related by some authors, that Atropates on one occasion presented Alexander with a hundred women, said to be Amazons; but Arrian ([Anabasis] vii. 13) disbelieved the story." Alexander himself died eight months later on June 10, 323 BCE, and Atropates' new son-in-law Perdiccas was named regent of Alexander's half-brother Philip III.