When the current king of Numidia died, he bequeathed his realm to his two sons and to Jugurtha, his nephew. A similar tripartite division had worked well enough on Masinissa’s death, probably because it had been guaranteed by the Romans. But Jugurtha did not want to share power. He had one brother assassinated and the other, Adherbal, fled to Rome. The Senate misguidedly decided that Numidia should be bisected between the two surviving rivals. Jugurtha refused to accept the settlement and besieged Adherbal in his capital. A resident community of Italian merchants persuaded the beleaguered king to give himself up on condition that his life be spared.
Jugurtha accepted the terms, but as soon as he had his cousin in his possession he put him to death—and many of the Italian merchants were massacred, too, for good measure. This was an irreparable mistake. Rome never forgave the murder of its citizens. War was declared and the Senate dispatched an army to Africa. However, Jugurtha soon agreed to surrender to a Roman general on condition that he keep his throne.
This was a completely unexpected outcome, and it was widely supposed that Jugurtha had bribed every Roman official with whom he had come into contact. The Senate set up a board of inquiry and Jugurtha was invited to Rome under a safe-conduct to reveal the identity of all those he had suborned. Incorrigible as ever, he bribed a tribune to prevent him from announcing any names. He was also responsible for the assassination of a cousin, who was living in Rome and had been invited by one of the consuls to claim the Numidian throne for himself. By now it was obvious that Jugurtha was a man with whom it was impossible to do business. He was sent back to Africa, and the fighting resumed.
An incompetent Roman army was soundly beaten by the Numidians and forced to march under a yoke of spears, as in the bad old days of the Samnite Wars. It was obliged to evacuate Numidia. At long last in 109, the Senate was persuaded to treat Jugurtha seriously and a competent and incorruptible general was sent out to rescue the war.
He was Quintus Caecilius Metellus, a member of a leading senatorial family. Marius was among Metellus’s clients and served as his legatus, or deputy. Now in his late forties, he had made reasonable progress up the political ladder for a novus homo, having been elected praetor in 114 and appointed governor of Lusitania. He was ambitious for the top job, even if it meant offending his longtime patron.
Metellus was winning the campaign, but slowly. Jugurtha had not been captured. Marius began to agitate that the war was being spun out unnecessarily. He was popular with the army rank and file and with Roman traders, not to mention voters at home. He asked Metellus for permission to return to Rome so that he could run for the consulship and take over the command. Being the aristocrat that he was, an irritated Metellus could not resist cracking a joke at his deputy’s expense. “So you are going to abandon us, are you, my dear fellow?” he asked. “Wouldn’t it be a better idea to delay your campaign until you can stand at the same time as this boy of mine?” Metellus’s son was only twenty.
Eventually, Marius was allowed to take his leave. In Rome, he raised enough popular and equestrian support to win the consulship. The Assembly disregarded the Senate’s decision to prolong Metellus’s command and appointed Marius in his place. This usurpation of the Senate’s traditional role in deciding provincial commands set a dangerous precedent. It paved the way for extraordinary commands for ambitious politicians who were willing to bypass the usual constitutional limitations.
Marius was determined to finish off Jugurtha at the earliest opportunity, so he levied more troops. However, he found the going as difficult and time-consuming as his predecessor had. He reduced stronghold after stronghold, but the legions were hard put to worst a highly mobile enemy on land well suited to the deployment of cavalry. Jugurtha strengthened his position by an alliance with his neighbor, Bocchus, the king of Mauretania. At long last a pitched battle was fought, which Marius won decisively—thanks in large part to Sulla, who commanded the cavalry, turning up at just the right moment.
However, the slippery Numidian king was still at large. He was not so slippery, though, as his new friend Bocchus, who decided to surrender him to the Romans. Simultaneously and falsely, the king promised Jugurtha to hand Sulla over to him; with such a distinguished captive, the Numidian calculated, he would easily be able to negotiate a peace with Rome. Bocchus invited the two men to a conference. Sulla, taking his life in his hands, rode to the rendezvous with only a few followers. At the last minute, the Mauretanian king had second thoughts and wondered anxiously whether, after all, he should favor Jugurtha. He eventually decided that the Roman was the better bet, and Jugurtha was arrested.
Jugurtha was taken to Rome and paraded in Marius’s triumph. Defeat made him lose his mind. When he was inserted, naked, into Rome’s main prison, the Tullianum, a tiny drumlike cellar with a shaft leading into the Cloaca Maxima, he said, “God, this Roman bath is cold.” He lasted six days in the dark and without food before dying.
Much to Marius’s fury, Sulla made the most of his coup and was widely credited with winning the war. He had a seal ring made that depicted Bocchus delivering, and Sulla receiving, Jugurtha.
We may imagine a smile lighting up Metellus’s face.
MARIUS WAS CREDITED with being a great military innovator, although it may be that the ancient sources have used him as a clotheshorse on which to hang a number of important reforms agreed at different times.
As the Gracchi had discovered, the days of the reasonably well-off yeoman were closing and, when he raised his additional troops for Africa, Marius recruited directly from the head count, Rome’s lowest economic and social stratum, who owned little or nothing and by law could not be drafted. This was not as revolutionary a step as might at first appear, for the prescribed property qualifications for legionaries had been falling for some time, and Marius was careful to ask for volunteers rather than conscripts.
One way or another, many recruits could no longer afford to pay for their own gear, as they had been expected to do in the past, and had no farms to return to. What had once been a militia was mutating into a near-professional army. This had one very dangerous consequence: soldiers became increasingly dependent on their commanders, both to ensure that they were well equipped and, already a problem in the age of Scipio, that they had somewhere to go when they were demobilized after their six to sixteen years’ term of service.
The system of maniples, the three lines of infantry and the forward screen of light-armed skirmishers, gave way during the second and first centuries to the cohort, a grouping of four hundred and eighty foot soldiers equivalent to three maniples. Not as complex and decentralized as the old arrangement, a legion of ten cohorts was more readily responsive to its commander during battle.
Marius standardized uniforms and weapons and, to foster esprit de corps, introduced the aquila, a silver eagle carried on a pole. It symbolized the legion, and its capture by the enemy conferred lasting shame on all its soldiers.
An ingenious technical device helped make survival on the field of battle a better bet. The heavy javelin, or pilum, was an essential part of the legionary’s armory. But when he threw it at his opponents, they often picked it up and hurled it back. Its iron head was attached to a wooden pole by two metal rivets. One of these was now replaced by a wooden dowel, so that the head was bent or snapped off entirely when the pilum reached its target or fell to the ground. This meant that it could not be reused.