Who ruled the tyrants

Some historians have supposed that the introduction of the hoplite phalanx early in the 7th century led to the development of a class of substantial farmers, who served in the phalanx and supported the tyrants as their champions against the aristocracies.

Explanation:

Tyrant, Greek tyrannos, a cruel and oppressive ruler or, in ancient Greece, a ruler who seized power unconstitutionally or inherited such power. In the 10th and 9th centuries bce, monarchy was the usual form of government in the Greek states.

Explanation:

the answer to your question is:

strong-mayor system