Thematic Bible: Armies of, described

And he will let a flag be lifted up as a sign to a far-off nation, whistling to them from the ends of the earth: and they will come quickly and suddenly. There is no weariness among them, and no man is feeble-footed: they come without resting or sleeping, and the cord of their shoes is not broken. Their arrows are sharp, and every bow is bent: the feet of their horses are like rock, and their wheels are like a rushing storm. read more.
The sound of their armies will be like the voice of a lion, and their war-cry like the noise of young lions: with loud cries they will come down on their food and will take it away safely, and there will be no one to take it out of their hands.

They are greatly to be feared: their right comes from themselves. And their horses are quicker than leopards and their horsemen more cruel than evening wolves; they come from far away, like an eagle in flight rushing on its food. They are coming all of them with force; the direction of their faces is forward, the number of their prisoners is like the sands of the sea.