The king who led Babylon to its peak power was Nebuchadnezzar.
The king who led Babylon to its peak power was Nebuchadnezzar. You can find the answer to this question by studying the history of Babylon and its rulers. Babylon reached its peak power and became a major world empire under the reign of Nebuchadnezzar II, who ruled from 605-562 BCE. He is known for his military campaigns and the construction of magnificent buildings, most notably the Hanging Gardens of Babylon.
