[note 1] On the assumption that this Gaius Fannius was not the historian who fought in the Third Punic War, in 146 BC he was a member of Quintus Caecilius Metellus Macedonicus’s staff in Macedonia, who sent him as part of an embassy to the Achaean League to convince them not to enter the war against Rome.
[2] Fannius next appears in 141 BC, serving with distinction as a military tribune in Hispania Ulterior under Quintus Fabius Maximus Servilianus in his war against Viriathus.
[4] Then probably around 127/6 BC, he was elected to the office of Praetor, during which time he was mentioned in a decree responding to the request for Roman assistance by John Hyrcanus, the ruler of the Hasmonean Kingdom.
[5] In 122 BC, with the support of the Tribune of the Plebs Gaius Gracchus, Fannius was elected consul, serving alongside Gnaeus Domitius Ahenobarbus.
[7] During his consulship he obeyed the Senate's directive and issued a proclamation commanding all of the Italian allies to leave Rome.