Which prophet communicated messages during the fall of Assyria?

Nahum is recognized as the prophet who communicated messages during the fall of Assyria, specifically focusing on the impending judgment of Nineveh, the capital of the Assyrian Empire. His prophecies are framed within the context of Assyria's moral corruption and the impending destruction that would come as a result, which he vividly portrays to emphasize God's sovereignty and justice.

Nahum's message served as both a comfort to the people of Judah, who had suffered under Assyrian oppression, and as a stark warning to Nineveh itself about its impending doom due to its wickedness. This specificity of time and purpose in his prophetic message marks Nahum distinctly among the prophets during this crucial historical period.

Isaiah, though a contemporary prophet, primarily addressed the broader context of Judah and provided messages about both judgment and hope but does not focus solely on Assyria's fall. Jonah's narrative involves a mission to Nineveh but occurs prior to Nahum's proclamations and emphasizes repentance rather than the destruction of the city. Hosea mainly addresses the northern kingdom of Israel and focuses on themes of infidelity and restoration rather than the Assyrian Empire. Thus, Nahum stands out as the prophet directly linked to the downfall of Assyria.