After the invasion of IraqUnited States forces built a military base on the ruins of Babylon.
The Kassites followed the Hittites and re-named the city Karanduniash. From there Agum III extended farther south still, invading what was many centuries later to be called the Arabian Peninsulaand conquering the pre-Arab state of Dilmun in modern Bahrain. His successor, Esarhaddon r. Babylon was invaded and sacked and Nabonassar reduced to vassalage.
Some researchers have uncovered evidence that suggests the hanging gardens existed, but not in Babylon —they may have actually been located in the city of Nineveh in upper Mesopotamia. The fall of Babylon was complete when the empire came under Persian control.
Later in his reign he went to war with Assyria, and had some initial success, briefly capturing the south Assyrian city of Ekallatum before ultimately suffering defeat at the hands of Ashur-Dan I.