They lacked physical firepower, but they had metaphysical/magical firepower. I imagine they purposefully filled gondorian soldier's mind with dread and misery u

They lacked physical firepower, but they had metaphysical/magical firepower. I imagine they purposefully filled gondorian soldier's mind with dread and misery using their powers (think fighter planes with capabilities of high end electronic and cyber warfare capabilities instead of traditional weapons) If not for Gandalf using his own metaphysical powers to give hope to the soldiers, I imagine the gondorians would have become inactive with shock due to terror and dread in the airwaves.