Israel and Judah were related Iron Age kingdoms of the ancient Levant. The Kingdom of Israel emerged as an important local power by the 9th century BCE before falling to the Neo-Assyrian Empire in 722 BCE. Israel's southern neighbor, the Kingdom of Judah, emerged in the 8th century BCE and enjoyed a period of prosperity as a client-state of first Assyria and then Babylon before a revolt against the Neo-Babylonian Empire led to its destruction in 586 BCE. Following the fall of Babylon to the Persian king Cyrus the Great in 539 BCE, some Judean exiles returned to Jerusalem, inaugurating the formative period in the development of a distinctive Judahite identity in the Persian province of Yehud. Yehud was absorbed into the subsequent Hellenistic kingdoms that followed the conquests of Alexander the Great, but in the 2nd century BCE the Judaeans revolted against the Hellenist Seleucid Empire and created the Hasmonean kingdom. This, the last nominally independent Judean kingdom, came to an end in 63 BCE with its conquest by Pompey of Rome. With the installation of client kingdoms under the Herodian Dynasty, the Kingdom of Israel was wracked by civil disturbances which culminated in the First Jewish–Roman War, the destruction of the Temple, the emergence of Rabbinic Judaism and Early Christianity.