The subject of this prophecy is the approaching complete and final destruction of Nineveh, the capital of the great and at that time flourishing Assyrian empire. Assur-bani-pal was at the height of his glory. Nineveh was a city of vast extent, and was then the centre of the civilzation and commerce of the world, a "bloody city all full of lies and robbery" (Nah. 3:1), for it had robbed and plundered all the neighbouring nations. It was strongly fortified on every side, bidding defiance to every enemy; yet it was to be utterly destroyed as a punishment for the great wickedness of its inhabitants.
Jonah had already uttered his message of warning, and Nahum was followed by Zephaniah, who also predicted (Zeph. 2:4-15) the destruction of the city, predictions which were remarkably fulfilled (B.C. 625) when Nineveh was destroyed apparently by fire, and the Assyrian empire came to an end, an event which changed the face of Asia.