Hippeis

Hippeis (Ancient Greek: ἱππεῖς, singular ἱππεύς, hippeus) is a Greek term for cavalry. In ancient Athenian society, after the political reforms of Solon, the hippeus was the second highest of the four social classes. It was composed of men who had at least 300 medimnoi or their equivalent as yearly income. According to the Timocratic Constitution the average citizen had a yearly income of less than 200 medimnoi. This gave the men who made 300 medimnoi the ability to purchase and maintain a war horse during their service to the state.

Its counterparts were the Roman equites (equestrians) and medieval knights.