tetrarchies
/ˈtɛtrɑːrkiz/
noun
- A form of government or system in which power is divided among four rulers or leaders.
- The ancient region was once ruled by a tetrarchy, with four kings sharing control.
- The country's tetrarchy collapsed when the four leaders could not agree on a single policy.
- Historians study the tetrarchies of the Roman Empire to understand how power was split.