For 10 points, name this position held by Agis I and Leonidas, rulers of a militaristic Greek city state.
One person who held this position was forced to abdicate by his partner, who bribed the Oracle and forced him to flee to Persia. That man, Demaratus, was replaced with Leotychides. Another person who held this position led an invasion of Attica in 425BC, and all of them were supposedly descended from Eurysthenes and Procles whose descendents form the Agiad and Europontid dynasties. Two of them ruled at all times with the help of the Ephors. For 10 points, name this position held by Agis I and Leonidas, rulers of a militaristic Greek city state.
One person who held this position was forced to abdicate by his partner, who bribed the Oracle and forced him to flee to Persia.
Kings of {Sparta} [prompt on {rulers} of {Sparta}]