The army was reformed, and without the need to pay for mercenaries the economy flourished. However these changes to the army was Cesarus last act, as he died due to illness. High Priest Megaravicos Culchid came to rule the Republic, but after nearly six years of rule he too died, the only notable thing accomplished by him would be the creation of an Ilergetan navy. The next ruler was Caucenus Auarosid, who ruler around a year, but lost power to Caros Mandonid, who most sources blames of having bought himself into power, and eager to make his mark, decided that the tribute paid by the Arevaci was insufficient, ended the payments and declared war on them.
Once again the Carpetani and the Lusitani supported the Arevaci, but without sending any armies. The Arevaci was soon driven away and Numantia was under siege. However the Arevaci general Leukon managed to keep his army intact, sough refuge in Cantabri, and from there launched an invasion of Vascones, smashing the Ilergetan army there, as well as taking control of the province. Despite this he could not prevent the fall of Numantia, and after some fighting he was driven away from Vascones which was recaptured, and the Arevaci ceased to be an independent power. By this time Audax Auarosid had been elected new leader, and he ordered the Ilergetan army to quickly advance against the Carpetani. In a swift campaign the Carpetani army was beaten and Toletum captured, the Carpetani agreeing to pay tribute. War with the Lusitani continued for a few years with no significant events.
Audax then decided to move against the Bituriges, for years they had caused trouble, and now the time to utterly humiliate them had come. The Republic ceased to recognize the tribute sent by the Bituriges, and declared war. The Bituriges could count on support from the Aulerci, Veneti and Carthage. However two years into the war the Aulerci chief Dumnocoverus annihilated the Army of Gaul, and soon they had overrun the Gallic holdings.
However after having raised more armies, and smashed a vast Carthaginian force that attempted to invade, the Ilergetans went on an offensive against the Aulerci.
In a few fierce battles the Aulerci army was crushed, and control of southern Gaul was being restored, and another large Carthaginian force was crushed. The Carthaginians who had shown great ineptitude in the waging of the war (by some sources they let the same general lead both invasion attempts, despite being completely incompetent in military matters) now felt it would be prudent to agree to pay a small monthly tribute to the Ilergetes. A few months later the Bituriges also agreed to pay tribute, however the new ruler, Megaravicos Auarosid, that had made the peace wth the Bituriges soon lost power to Megaravicos Ambonid.