Nabopolassar was the first king of the Chaldean Empire, better known as Babylon (625 BC-605 BC).
The weakened Assyrians couldn't resist his power and that of the Medes who sacked the Assyrian capital Nineveh in 612 BC. Nabopolassar was left in control of Nineveh and destroyed the remnants of the Assyrian Empire in 609 BC.
Nabopolassar waged war against Egypt from 610 BC till 605 BC. In 605 BC his son Nebuchadnezzar won the Battle of Carchemish shortly before Nabopolassar died. Nebuchadnezzar succeeded him to the throne of Babylon.