King Nebuchadnezzer was the king of the Babylonian Empire from between 1125BC to 1103BC. He is widely considered the greatest king of the Pashe Dynasty. His bloodline held the throne throughout the 12th century BC.
Nebuchadnezzer's greatest legacy was the re-establishment of the Babylonian lands. This was done by driving out the Elamites, who had earlier taken over a large portion of his territory. By successfully driving back the Elamites, Nebuchadnezzer was able to unify his borders.
However, this led to a long war with the Assyrians,who shared the same borders with the Babylonian Empire. It is important to point out that this Nebuchadnezzer is not the same biblical figure of Nebuchadnezzer II, who conquered Jerusalem and Judah. The Hanging Gardens of Babylon are attributed to the biblical Nebuchadnezzer II, not the historical figure.