Herodotus, the ancient Greek historian from the fifth century BC, gave these “heavy infantry” members their lasting name. Find out how and why it fit so perfectly in the video above.

According to Wikipedia, the soldiers played a pivotal role in Cyrus the Great’s conquest of Babylon in 539 BC, Cambyses II’s conquest of Egypt in 525 BC and Darius I’s invasion of India’s smaller western kingdoms (now Pakistan) and Scythia in 520 BC and 513 BC.

Their armament? Just wicker shields, short spears, swords or large daggers, bows and arrows. They also wore robes with armor coats underneath and even tiaras.

That’s right. Tiaras.