Aemilius carried on regardless. The siege of Pallantia dragged on and the Roman supplies failed. All pack animals and many men died. The Romans withdrew in a disorderly way at night. At dawn the enemy attacked them at the rear and flank all day. Aemilius Lepidus was stripped of this consulship and when he returned to Rome he was fined. In 135 BC, the consul Quintus Calpurnius Piso was assigned Hispania. He made an incursion in the territory of Pallantia, collected a small amount of plunder and spent the rest of his term of office in winter camp in Carpetania (in central Hispania). In 134 BC, the Romans, who were tired of this war, elected Scipio Aemilianus (who had defeated Carthage) as consul because they thought that he was the only man who could win the war. The army in Hispania was demoralised and ill-disciplined. Scipio concentrated on restoring discipline by forbidding luxuries the troops had become accustomed to, through regular tough exercises (all-day marches, building camps and fortifications and then demolishing them, digging ditches and then filling them up, and the like) and by enforcing regulations strictly. When he thought that the army was ready he encamped near Numantia. He did not proceed along the shorter route to avoid the guerrilla tactics the Numantines were good at. Instead, he made a detour through the land of the Vaccaei, who now were selling food to the Numantines. He was ambushed several times, but defeated the enemy. In one of these ambushes, by a river that was difficult to cross, he was forced to make a detour along a longer route where there was no water. He marched at night when it was cooler and dug wells into bitter water. He saved his men, but some horses and pack animals died of thirst. Then he passed through the territory of the Caucaei who had broken the treaty with Rome and declared that they could return safely to their homes. He returned to the Numanitine territory and was joined by Jugurtha, the grandson of the king of Numidia (a Roman ally in Africa), with twelve elephants, archers and slingers. Eventually, Scipio prepared to besiege Numantia. He asked the allied tribes in Hispania for specified numbers of troops. He built a nine-kilometre circuit of fortifications with seven towers. The wall was three metres high and two and a half metres wide. He built