Adam Clarke on Micah 5:6

The land of Nimrod - Assyria, and Nineveh its capital; and Babylon, which was also built by Nimrod, who was its first king, Gen 10:11, Gen 10:12, in the margin.

In the entrances thereof - At its posts or watergates; for it was by rendering themselves masters of the Euphrates that the Medes and Persians took the city, according to the prediction of Jeremiah, Jer 51:32, Jer 51:36. Calmet thinks that this refers to the deliverance of the land from Cambyses by his death, and the insurrection of the eight princes mentioned above, who made themselves masters of the whole Babylonian empire, etc. Perhaps it is best to refer it to the invasion of Judea by Nebuchadnezzar; and the final destruction of the Babylonish empire by Cyrus, who took Babylon, slew Belshazzar, and possessed himself of the kingdom.