Jamieson, Fausset and Brown on Zephaniah 2:13

13. Here he passes suddenly to the north. Nineveh was destroyed by Cyaxares and Nabopolassar, 625 B.C. The Scythian hordes, by an inroad into Media and thence in the southwest of Asia (thought by many to be the forces described by Zephaniah, as the invaders of Judea, rather than the Chaldeans), for a while interrupted Cyaxares' operations; but he finally succeeded. Arbaces and Belesis previously subverted the Assyrian empire under Sardanapalus (that is, Pul?), 877 B.C.