Question: Gnaeus Pompeius of Pompeia became a member of the First Triumvirate along with this general and politician who played a key role in the transformation of the Roman Republic into the Roman Empire and was the second wealthiest person next to which person?
Sentence (from "Pompeia (gens)"): After the death of Crassus, the rivalry between Caesar and Pompeius led to the Civil War, one of the defining events of the final years of the Roman Republic.
Relevant evidence: No