Roman General wins epic victories. Incurs jealousy from Mark Antony. Returns to Rome and celebrates Triumph over being the first to win against Parthia. Disappears afterward from historical records HMMMMM Publius Ventidius - Wikipedia
I'm betting Octavian quietly had him killed because a talented general on the side of Mark Antony is bad news, so he took the chance because Mark Antony at the time wouldn't object cuz jelly