A sudden and dramatic military campaign is about to unfold, bringing with it a profound sense of divine judgment. This is not a standard territorial conquest, but rather a direct revelation of punishment falling upon a complacent nation.
The invading forces arrive from a remarkably distant land in the east, specifically the region of Elam [ראב״ע, רד״ק]. To emphasize the sheer vastness of this distance, their origin is portrayed as the very edge of the heavens, painting a picture of an army marching from the farthest reaches of human settlement, or the point where the earth seems to touch the sky [רד״ק, מצודת דוד, ראב״ע, אברבנאל, מלבי״ם]. This distant threat descends with absolute suddenness. They strike at a moment when the people of Babylon are celebrating and at peace, completely unaware and unexpecting of any impending danger [מלבי״ם].
While these invaders first appear as ordinary soldiers, their arrival quickly reveals a deeper reality [שד״ל]. The primary approach among commentators is that these forces are the mighty armies of Media and Persia [רש״י, מצודת דוד, ראב״ע]. However, they are not driven by standard human motives. Unlike typical invading armies motivated by greed and the desire for plunder, these soldiers operate strictly under a divine decree [אברבנאל]. God Himself leads the military campaign, and these foreign nations serve merely as the physical weapons designed to execute His anger and carry out His judgment [רד״ק, מצודת דוד, ראב״ע, ביאור שטיינזלץ].
The ultimate goal of this invasion is total ruin and destruction [מצודת ציון, ביאור שטיינזלץ]. Although the scope of this devastation might sound global, there is a clear consensus among the commentators that the targeted territory is not the entire world. Rather, the campaign is focused exclusively on the land of Babylon, and its complete ruin is the sole objective of this divine mission [רש״י, מצודת דוד, רד״ק, מלבי״ם, אברבנאל].