Who defeated the new Babylonian empire under Belshazzar's rule?

The new Babylonian empire under Belshazzar was defeated by the Persian forces led by Cyrus the Great in 539 BCE. The fall of Babylon occurred during a feast when Belshazzar ignored ominous signs, and the Persian army secretly diverted the Euphrates River to enter the city through its dry riverbed. This event marked the end of the Neo-Babylonian Empire and the rise of Persian dominance in the region.