Titus Labienus
After the defeat of the Pompeian forces in Hispania, Piso escaped to North Africa. There the "optimates" raised an army which included 40,000 men (about eight legions), a powerful cavalry force led by Caesar's former right-hand man, the talented Titus Labienus, forces from local allied kings, and sixty war elephants. This force was commanded by Metellus Scipio, who placed Piso in command of the Numidian cavalry.