The verse describes an army that marches in perfect order, cannot be pushed aside, and is unharmed by weapons. Commentators use vivid historical accounts of locust swarms to illustrate this point: they cannot be stopped by fire, trenches, or even gunfire. This serves as a powerful metaphor for the nature of God's judgment. When God decides to act, His instruments—whether an army or a natural plague—are irresistible and cannot be thwarted by human strength or ingenuity.