So this is a depiction of hoplites, which are Greek citizen soldiers in ancient Greece. And you'll also hear about a phalanx. A phalanx is the formation where they walked or they marched very tightly together. And when archers came, they would put all their shields up and they'd almost be like this armored tank. And it was a very effective method of warfare. Another word that you will hear associated with Sparta and those slaves is helots. Those were the names of those slaves.