The downfall of Gog's massive army is not limited to the battlefield in the land of Israel. The consequences of their invasion echo far beyond the front lines, reaching back to the very lands from which they came. The punishment strikes the homeland of Gog itself [מלבי״ם, ביאור שטיינזלץ]. The nature of this destruction is described as a fire, though commentators understand this in several ways. Some view it as an eternal flame [צאינה וראינה], while others see it as a metaphor for a devastating plague and total ruin [מלבי״ם]. Alternatively, it can be understood either as a literal fire or as a metaphor for absolute annihilation that consumes everything in its path [רד״ק].
This devastation does not stop at Gog's borders. It spreads to the other nations and armies that joined his campaign [מצודת דוד, ביאור שטיינזלץ]. These allies inhabit isolated regions, separated from the rest of humanity [מלבי״ם]. Because of their distance, they felt completely safe, protected, and at peace in their remote homelands [מלבי״ם, מצודת דוד, ביאור שטיינזלץ].
The ultimate goal of this widespread judgment is universal recognition. When this unexpected disaster strikes these distant nations right in their own secure homes, they will finally recognize God's greatness [מלבי״ם, ביאור שטיינזלץ, צאינה וראינה]. Through this, they will understand that He is entirely faithful to fulfill His word [מצודת דוד].