After Julius Caesar was murdered in 44 BCE, Quintus Labienus, a Roman republican general and ambassador to the Parthians, sided with Brutus and Cassius in the Liberators' civil war; after their defeat Labienus joined the Parthians and assisted them in invading Roman territories in 40 BCE.
Zenon encouraged the locals to resist the Roman General Quintus Labienus and King Pacorus I of Parthia, when their armies invaded Syria and Anatolia.
After Brutus and Cassius fled east to Macedonia and were defeated there in the Battle of Philippi by Caesar's imperialist successors (the Second Triumvirate, particularly Mark Antony and Caesar's heir Octavian, the future emperor Augustus), Labienus joined the Parthians.
Quintus Fabius Maximus | Quintus Aurelius Symmachus | Titus Labienus | Quintus Roscius Gallus | Quintus Mucius Scaevola | Quintus Curtius Rufus | Quintus Caecilius Metellus Numidicus | Quintus Mucius Scaevola Augur | Quintus Labienus | Quintus | Lucius Quintus Cincinnatus Lamar (II) | Quintus Valerius Pompey | Quintus Tineius Sacerdos Clemens | Quintus Terentius Scaurus | Quintus Sulpicius Camerinus | Quintus Servilius Pudens | Quintus Servilius Caepio | Quintus Poppaedius Silo | Quintus Pompeius Falco | Quintus Petillius Cerialis | Quintus Pedius Publicola | Quintus Pedius | Quintus Mucius Scaevola Pontifex | Quintus Fabius Maximus (consul 45 BC) | Quintus Caecilius Metellus Celer (consul) | Quintus Caecilius Metellus Celer | Quintus Caecilius Metellus Balearicus | Quintus Caecilius Iucundus | Quintus Aurelius Memmius Symmachus | Quintus Antistius Labeo |