Under the
Achaemenids, the "Iranization" of
Asia Minor had been significant, and a large Iranian presence had been established in western Asia Minor,
Pontus and
Cappadocia.
Ariarathes had been
satrap of Cappadocia for 19 years and a loyal supporter of the Achaemenid kings. By blood, he was related to the ruling Achaemenid house ("Cyrus and Darius’ Seven") as well as other satraps. When
Alexander of Macedon invaded Cappadocia as part of his conquest of the Persian Empire, he appointed two temporary governors. For the Iranians in Asia Minor, "as perhaps everywhere", the fall of the Achaemenids "meant crisis". With the victory of Alexander and the emergence of
Hellenistic successor kings, the Iranians in
Caria and "probably throughout western Asia Minor" eventually started to adapt themselves to the changing situation. The Iranian presence to the west of the
Halys River thus slowly started to fade. However, to east of the Halys River, things went differently. The Cappadocians had shown opposition to the invading Macedonians "from the beginning". After the
defense of Halicarnassus, the Cappadocians participated in the
Battle of Gaugamela (331 BCE) against Alexander, and even after the battle, they "rose up in his rear". Unlike the Iranians in Caria and "probably throughout western Asia Minor", the Iranian aristocracy to the east of the Halys River, in Cappadocia and Pontus, declared independence, "in defiance of the Macedonians". Ariarathes I managed to assume power in Cappadocia, becoming the first king of the newly established Kingdom of Cappadocia. Ariarathes's line would provide the first ten kings of the kingdom. After a period of
Seleucid overlordship, the Cappadocian Kingdom gained its independence during the reign of
Ariarathes III ( 255-220 BC). The
Ariarathid dynasty was abolished by the early course of the 1st century BC by the ruler of the
Kingdom of Pontus, the infamous
Mithridates VI (
Eupator), this in an attempt to fully subdue the Cappadocian Kingdom. However, in "conflict" with the interests of the Roman Republic, the Romans supported the Cappadocians to choose a new king; this came to be another Iranian nobleman, namely
Ariobarzanes I. After the civil war in Rome, the Romans started to interfere more directly in Cappadocian affairs; in 36 BC,
Marcus Antonius appointed
Archelaus, a local noble, to the Cappadocian throne. When, at an old age, Tiberius summoned him to Rome, he died there of natural causes; Cappadocia was subsequently incorporated as a fully functioning Roman province. Due to the kingdom's perilous location amongst powerful neighbors, the kings were often involved in beneficial marriage alliances, such as with the
Mithridatic dynasty as well as the
Seleucid dynasty.
Strabo, who wrote during the time of
Augustus (r. 63 BCE-14 AD), almost three hundred years after the fall of the Achaemenid Persian Empire, records only traces of Persians in western
Asia Minor; however, he considered Cappadocia "almost a living part of Persia". ==Religion==