The collapse of the Babylonian empire is not a random twist of history, but a calculated military strike guided by Divine providence. God Himself initiates the campaign, awakening and driving a massive coalition of nations to execute the city's destruction [מצודת ציון, מלבי״ם, ביאור שטיינזלץ]. This vast assembly [מצודת ציון] consists of the formidable empires of Media and Persia, marching down from the north [מצודת דוד]. Upon reaching the city, these forces will systematically arrange their ranks, preparing for a direct, frontal assault [רש״י, מצודת דוד, מצודת ציון].
The sheer power and efficiency of this army guarantee immediate success. From the exact spot where they establish their battle lines and lay siege, they will conquer the city, eliminating any need to maneuver or shift positions [רד״ק, מצודת דוד]. Alternatively, their attack will be so direct that they will breach the walls of Babylon straight from the northern side where they first arrived [מלבי״ם].
The peak of this military threat is captured in the deadly nature of the enemy's arrows. These weapons are compared to a mighty warrior, a concept understood in two distinct ways. The primary approach among commentators links this description to bereavement and slaughter. The arrows will strike with lethal precision, spreading death and leaving children orphaned. They act as a warrior who never leaves the battlefield without claiming a life. In a more brutal variation of this view, the attacking warrior is so fiercely determined to kill that if he cannot find enemy soldiers, he will target young children simply to bereave their fathers, ensuring his efforts are not wasted [מלבי״ם].
On the other hand, a second approach interprets the comparison as a matter of intellect and wisdom. The arrows will fly through the air as if they possess a mind of their own, navigating perfectly to their targets like a wise, calculating warrior who never misses [מלבי״ם]. Ultimately, the weapons of this northern army act like a trusted messenger sent on a crucial mission. Just as a reliable messenger never comes back without results, these arrows will fully accomplish their destructive goal [מצודת ציון].