Triumvirate

Coins of the triumvirs, Mark Antony, Octavian, and Lepidus, comprising the Second Triumvirate (43 – 33 or 27 B.C.E.) during the Roman Republic. They bear the inscription iiivir r p c (triumvir rei publicae constituendae—“triumvir for the regulation of the republic”).

A triumvirate (Latin: triumvirātus) or a triarchy is a political institution ruled or dominated by three individuals, known as triumvirs (Latin: triumviri). The arrangement can be formal or informal. Though the three leaders in a triumvirate are notionally equal, the actual distribution of power may vary.

Informally, the term "triumvirate" may be used for any association of three.

Under the influence of the Soviet Union, the term troika (Russian: for "group of three") may be used for "triumvirate".