A dramatic picture of divine justice unfolds when the immense power and arrogant joy of Israel's enemies are turned into their ultimate downfall. The invading army is described as so massive that it cannot be contained within fortified walls, spilling out and spreading across vast open spaces [מצודת דוד, רד״ק, מלבי״ם]. The exact identity of this overwhelming force is debated. It may represent the historical siege of Sennacherib and his camp [רש״י, מצודת דוד], a general wicked king [אבן עזרא], the apocalyptic armies of Gog and Magog [רד״ק, צאינה וראינה], or the various nations of the world that have harmed Israel throughout the long years of exile [מלבי״ם].
These forces arrive with the terrifying intensity of a violent storm [מצודת ציון], driven by the singular goal of scattering the Israelites and driving them from their homeland into exile among the nations [מצודת דוד, רד״ק, אבן עזרא, מלבי״ם]. However, God intervenes with a strict decree [מלבי״ם], fatally piercing and injuring the enemy's leadership [מצודת ציון]. The primary approach among commentators is that God uses the enemy's own weapons against them. He strikes the heads of the army commanders using the very same staff they once used to brutally oppress others [רש״י, מצודת דוד, ביאור שטיינזלץ]. Another perspective suggests that God specifically strikes down the wicked king leading the charge [אבן עזרא]. Alternatively, God throws the enemy camp into a state of total confusion and madness, causing the soldiers to turn on each other and strike down their own leaders with their weapons [רד״ק, צאינה וראינה]. The target of this strike can refer to the military leaders and mayors [רש״י, ביאור שטיינזלץ], or it may symbolize the sheer overwhelming number of enemy soldiers [מלבי״ם].
Before their defeat, the attackers are filled with a twisted, arrogant joy [מצודת ציון, אבן עזרא], focused entirely on the suffering and oppressed Israelites [רש״י, מצודת ציון, רד״ק]. They eagerly anticipate the destruction of Israel, acting like robbers or murderers ambushing a helpless victim in a hidden place. They do this out of a false sense of security, convinced that God does not see their actions and that they will escape punishment [רד״ק, ביאור שטיינזלץ, צאינה וראינה]. This arrogant confidence is compared to the joy of Pharaoh, who chased the Israelites to the Red Sea thinking he would destroy them in secret, only to meet his own death [מצודת דוד, רד״ק, צאינה וראינה].
This theme of secret cruelty extends beyond a single battle. Throughout the exile, even when nations did not destroy Israel publicly, they took deep satisfaction in secretly robbing and oppressing the vulnerable [מלבי״ם]. Another unique view explains that the enemy's joy stems from causing devastating starvation in the land, forcing the impoverished Israelites to eat their meager rations in hiding so their food would not be stolen [אבן עזרא]. Ultimately, however, the tables are turned. The enemy's arrogant joy shatters, and they face a humiliating downfall. They are forced to flee into hiding, where they are left with only a tiny amount of food to eat in secret, mirroring the very suffering they once inflicted on others [ביאור שטיינזלץ].