Ancient Armenia, located in the south Caucasus area of Eurasia, was settled in the Neolithic era but its first recorded state proper was the kingdom of Urartu from the 9th century BCE. Incorporated into the Persian Empire of Cyrus the Great in the 6th century BCE, the Orontid dynasty ruled as Persian satraps, a function they performed for their next overlords the Macedonians and Seleucid Empire into the 3rd century BCE. Under the Artaxiad and Arsacid dynasties the country flourished but was often caught between the ambitions of Parthia and Rome, and then the Sasanian and Byzantine Empires. The boundaries of the state varied considerably over the centuries but such common factors as religion and language were united by long-lasting dynastic clans, which gave Armenia its own unique identity throughout antiquity.