commanded the Carthaginian forces on Sicily for the last six years of the First Punic War. The rebels held the line of the Bagradas River with 10,000 men commanded by Spendius. Hamilcar would need to force a crossing if he were to gain access to open country where he could manoeuvre. He did so by a stratagem, and Spendius was reinforced by an additional 15,000 men drawn from the force laying siege to Utica, which the rebels had renewed. The rebel army of 25,000 moved to attack Hamilcar in the Battle of the Bagradas River. What happened next is unclear: it seems Hamilcar feigned a retreat, the rebels broke ranks to pursue, the Carthaginians turned in good order and counter-attacked, routing the rebels, who suffered losses of 8,000 men. Hamilcar was appointed joint commander of the Carthaginian army, alongside Hanno, but there was no cooperation between the two. While Hanno manoeuvred against Matho to the north near Hippo, Hamilcar confronted various towns and cities which had gone over to the rebels, bringing them back to Carthaginian allegiance with varying mixtures of diplomacy and force. He was shadowed by a superior-sized rebel force, which kept to rough ground for fear of Hamilcar's cavalry and elephants, and harried his foragers and scouts. South west of Utica, Hamilcar moved his force into the mountains in an attempt to bring the rebels to battle, but was surrounded. The Carthaginians were only saved from destruction when a Numidian leader, Naravas, who had served with and admired Hamilcar in Sicily, swapped sides, bringing 2,000 cavalry with him. This proved disastrous for the rebels, and in the resulting battle, they lost 10,000 killed and 4,000 captured. Truceless War Since leaving Carthage, Hamilcar had treated rebels he had captured well and offered them a choice of joining his army or free passage home. He made the same offer to the 4,000 captives from the recent battle. The rebel leaders perceived this generous treatment as the motivation behind Naravas's defection and feared the disintegration of their army; they were aware that such generous terms would not be extended to them personally. To remove the possibility of any goodwill between the sides, Spendius, encouraged by his fellow leader the Gaul Autaritus, had 700 Carthaginian prisoners, including Gisco, tortured to death: they had their hands cut off, were castrated, their legs broken and were thrown into a pit and buried alive.