The union of which three prominent figures in Roman history was given the name "First Triumvirate"?

The First Triumvirate of ancient Rome was an uneasy alliance between the three titans Julius Caesar, Pompey, and Crassus which, from 60 BCE until 53 BCE, dominated the politics of the Roman Republic. Alliances have always been a part of history. Whether one looks to the unification of Sparta and Athens against the Persians in the 5th century BCE or the allied forces of the Triple Entente in World War I, nations and individuals - even former enemies - have sought assistance for one reason or another to overcome a common foe. Ancient Rome was no different. An unstable Republic and a near civil war brought three men to set aside their differences and even contempt for one another to join forces and dominate the government of Rome, even controlling elections, for nearly a decade. One of the three would eventually rise above the others and become dictator. His name was Gaius Julius Caesar. However, that was several years away. For now he was part of what modern historians have come to call the First Triumvirate.