How was Babylon under the control of Nebuchadnezzar II?

Answer 1

Nebuchadnezzar was the oldest son and successor of Nabopolassar,who delivered Babylon from its three centuries of vassalage to its fellow Mesopotamian state, Assyria, and in alliance with the Medes, Persians, Scythians, and Cimmerians, laid Nineveh in ruins. According to Berossus, some years before he became king of Babylon, Babylonian dynasties were united. There are conflicting accounts of Nitocris of Babylon being either his wife or daughter. Nabopolassar was intent on annexing the western provinces of Syria (ancient Aram) from Necho II (whose own dynasty had been installed as vassals of Assyria, and who was still hoping to help restore Assyrian power), and to this end dispatched his son westward with a large army. In the ensuing Battle of Carchemish in 605 BC, the Egyptian andAssyrianarmy was defeated and driven back, and the region of Syria and Phoenicia were brought under the control of Babylon. Nabopolassar died in August that year, and Nebuchadnezzar returned to Babylon to ascend the throne. After the defeat of the Cimmerians and Scythians, previous allies in the defeat of Assyria, Nebuchadnezzar's expeditions were directed westward. The powerful Median empire lay to the north. Nebuchadnezzar's political marriage to Amytis of Media, the daughter of theMedianking, had ensured peace between the two empires.