Which year marked the fall of Assyria according to Nahum?

The fall of Assyria is identified as occurring in 612 BC, which is clearly articulated in the prophetic book of Nahum. Nahum focuses on the impending doom of Nineveh, the capital of the Assyrian Empire, highlighting its destruction and the end of Assyrian dominance. This pivotal event in history is significant as it marked the decline of one of the ancient world's most powerful empires, leading to shifts in power dynamics in the region.

The other years listed do not align with the historical timeline provided by Nahum. The year 720 BC, for example, precedes the fall and is known for the larger context of Assyrian expansions. The year 600 BC also does not correspond with this significant event, as it came after the fall of Assyria. Lastly, 586 BC is commonly associated with the fall of Jerusalem, which further distances it from the Assyrian collapse that Nahum prophesied. Thus, 612 BC stands as the correct answer when identifying the year of Assyria's fall per the Book of Nahum.