[1][2] Galba served as tribune of the soldiers for part of the second legion in Macedonia, under Lucius Aemilius Paullus Macedonicus.
He was awarded Hispania (the Iberian Peninsula, including modern Spain and Portugal) as his province, where a war was being fought against the Celtiberians.
Appian states that Galba, although wealthy, was miserly, and that he did not even lie or perjure himself, provided he could thereby gain pecuniary advantages.
[3] In the following year, when Galba had returned to Rome, the tribune, Lucius Scribonius Libo, brought a charge against him for the outrage he had committed on the Lusitanians.
The senate chose Quintus Fabius Maximus Aemilianus, the consul of the year before, to continue commanding the army in Hispania.