In 134 BC Scipio was elected consul again because the citizens thought that he was the only man capable of defeating the Numantines in the Numantine War. The Celtiberians of the City of Numantia, which had strong defensive geographical features, held off the Romans for nine years. The army in Hispania was demoralized 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 though the land of the Vaccaei, who were selling food to the Numantines. He was ambushed several times but defeated the enemy. In one of these ambushes by a river which 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 which had 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 Numantine territory and was joined by Jugurtha, the son of the king of Numidia, with archers, slingers, and twelve elephants.