Nahum prophesied during the reign of Hezekiah, probably about one hundred and fifty years after Jonah. He has but one subject--the destruction of Nineveh. According to Diodorus Siculus, the city was destroyed nearly a century later, precisely as here predicted. The prophecy is one continuous strain which does not yield to analysis. The moral theme is: the holiness of Jehovah which must deal with sin in judgment.
JFB Commentary
Sargon, Shalmaneser's successor, after the reduction of PhSnicia by the latter, fearing lest Egypt should join Palestine against him, undertook an expedition to Africa (Isa 20:1-6), and took Thebes; the latter fact we know only from Nahum, but the success of the expedition in general is corroborated in Isa 20:1-6. Sennacherib, Sargon's successor, made the last Assyrian attempt against Judea, ending in the destruction of his army in the fourteenth year of Hezekiah (713-710 B.C.). As Nahum refers to this in part prophetically, in part as matter of history (Na 1:9-13; 2:13), he must have lived about 720-714 B.C., that is, almost a hundred years before the event foretold, namely, the overthrow of Nineveh by the joint forces of Cyaxares and Nabopolassar in the reign of Chyniladanus, 625 or 603 B.C.
The prophecy is remarkable for its unity of aim. Nahum's object was to inspire his countrymen, the Jews, with the assurance that, however alarming their position might seem, exposed to the attacks of the mighty Assyrian, who had already carried away the ten tribes, yet that not only should the Assyrian (Sennacherib) fail in his attack on Jerusalem, but Nineveh, his own capital, be taken and his empire overthrown; and this, not by an arbitrary exercise of Jehovah's power, but for the iniquities of the city and its people.