|An altogether different take on triumvirate, courtesy of freedarko.com|
Of course, triumvirates don't often work out, and it was the same in Rome. The first was a shared power structure amongst Julius Caesar, Pompey, and Crassus, which resulted in Caesar as the first emperor of Rome. This led, interestingly, to a second triumvirate after the turmoil resulting from Caesar's power play. Octavian, Marc Antony, and Lepidus tried the same power-sharing structure to the same result but the second failed attempt cemented the imperial structure provoked by Caesar, now with Augustus (formerly Octavian) as the grand ruler for decades to follow.
If all these power plays and historical characters trip you up, check out the HBO series. Or dig in to the Roman history well-told in the history books - it makes for fascinating reading.