At his first beginning, he served under Caepio, when the Cimbri and Teutones invaded Gaul; where the Romans fighting unsuccessfully, and being put to flight, he was wounded in many parts of his body, and lost his horse, yet, nevertheless, swam across the river Rhone in his armor, with his breastplate and shield, bearing himself up against the violence of the current; so strong and so well inured to hardship was his body.

The second time that the Cimbri and Teutones came down with some hundreds of thousands, threatening death and destruction to all, when it was no small piece of service for a Roman soldier to keep his ranks and obey his commander, Sertorius undertook, while Marius led the army, to spy out the enemy’s camp. Procuring a Celtic dress, and acquainting himself with the ordinary expressions of their language requisite for common intercourse, he threw himself in amongst the barbarians; where having carefully seen with his own eyes, or having been fully informed by persons upon the place of all their most important concerns, he returned to Marius, from whose hands he received the rewards of valor; and afterwards giving frequent proofs both of conduct and courage in all the following war, he was advanced to places of honor and trust under his general. After the wars with the Cimbri and Teutones, he was sent into Spain, having the command of a thousand men under Didius, the Roman general, and wintered in the country of the Celtiberians, in the city of Castulo, where the soldiers enjoying great plenty, and growing insolent, and continually drinking, the inhabitants despised them and sent for aid by night to the Gyrisoenians, their near neighbors, who fell upon the Romans in their lodgings and slew a great number of them. Sertorius, with a few of his soldiers, made his way out, and rallying together the rest who escaped, he marched round about the walls, and finding the gate open, by which the Gyrisoenians had made their secret entrance, he gave not them the same opportunity, but placing a guard at the gate, and seizing upon all quarters of the city, he slew all who were of age to bear arms, and then ordering his soldiers to lay aside their weapons and put off their own clothes, and put on the accoutrements of the barbarians, he commanded them to follow him to the city, from whence the men came who had made this night attack upon the Romans. And thus deceiving the Gyrisoenians with the sight of their own armor, he found the gates of their city open, and took a great number prisoners, who came out thinking to meet their friends and fellow-citizens come home from a successful expedition. Most of them were thus slain by the Romans at their own gates, and the rest within yielded up themselves and were sold for slaves.

This action made Sertorius highly renowned throughout all Spain, and as soon as he returned to Rome he was appointed quaestor of Cisalpine Gaul, at a very seasonable moment for his country, the Marsian war being on the point of breaking out. Sertorius was ordered to raise soldiers and provide arms, which he performed with a diligence and alacrity, so contrasting with the feebleness and slothfulness of other officers of his age, that he got the repute of a man whose life would be one of action. Nor did he relinquish the part of a soldier, now that he had arrived at the dignity of a commander, but performed wonders with his own hands, and never sparing himself, but exposing his body freely in all conflicts, he lost one of his eyes. This he always esteemed an honor to him; observing that others do not continually carry about with them the marks and testimonies of their valor, but must often lay aside their chains of gold, their spears and crowns; whereas his ensigns of honor, and the manifestations of his courage always remained with him, and those who beheld his misfortune, must at the same time recognize his merits. The people also paid him the respect he deserved, and when he came into the theater, received him with plaudits and joyful acclamations, an honor rarely bestowed even on persons of advanced standing and established reputation. Yet, notwithstanding this popularity, when he stood to be tribune of the people, he was disappointed, and lost the place, being opposed by the party of Sylla, which seems to have been the principal cause of his subsequent enmity to Sylla.

After that Marius was overcome by Sylla and fled into Africa, and Sylla had left Italy to go to the wars against Mithridates, and of the two consuls Octavius and Cinna, Octavius remained steadfast to the policy of Sylla, but Cinna, desirous of a new revolution, attempted to recall the lost interest of Marius, Sertorius joined Cinna’s party, more particularly as he saw that Octavius was not very capable, and was also suspicious of anyone that was a friend to Marius. When a great battle was fought between the two consuls in the forum, Octavius overcame, and Cinna and Sertorius, having lost not less than ten thousand men, left the city, and gaining over most part of the troops who were dispersed about and remained still in many parts of Italy, they in a short time mustered up a force against Octavius sufficient to give him battle again, and Marius, also, now coming by sea out of Africa, proffered himself to serve under Cinna, as a private soldier under his consul and commander.

Most were for the immediate reception of Marius, but Sertorius openly declared against it, whether he thought that Cinna would not now pay as much attention to himself, when a man of higher military repute was present, or feared that the violence of Marius would bring all things to confusion, by his boundless wrath and vengeance after victory. He insisted upon it with Cinna that they were already victorious, that there remained little to be done, and that, if they admitted Marius, he would deprive them of the glory and advantage of the war, as there was no man less easy to deal with, or less to be trusted in, as a partner in power. Cinna answered, that Sertorius rightly judged the affair, but that he himself was at a loss, and ashamed, and knew not how to reject him, after he had sent for him to share in his fortunes. To which Sertorius immediately replied, that he had thought that Marius came into Italy of his own accord, and therefore had deliberated as to what might be most expedient, but that Cinna ought not so much as to have questioned whether he should accept him whom he had already invited, but should have honorably received and employed him, for his word once past left no room for debate. Thus Marius being sent for by Cinna, and their forces being divided into three parts, under Cinna, Marius, and Sertorius, the war was brought to a successful conclusion; but those about Cinna and Marius committing all manner of insolence and cruelty, made the Romans think the evils of war a golden time in comparison. On the contrary, it is reported of Sertorius, that he never slew any man in his anger, to satisfy his own private revenge, nor ever insulted over anyone whom he had overcome, but was much offended with Marius, and often privately entreated Cinna to use his power more moderately. And in the end, when the slaves whom Marius had freed at his landing to increase his army, being made not only his fellow-soldiers in the war, but also now his guard in his usurpation, enriched and powerful by his favor, either by the command or permission of Marius, or by their own lawless violence, committed all sorts of crimes, killed their masters, ravished their masters’ wives, and abused their children, their conduct appeared so intolerable to Sertorius that he slew the whole body of them, four thousand in number, commanding his soldiers to shoot them down with their javelins, as they lay encamped together.

Afterwards, when Marius died, and Cinna shortly after was slain, when the younger Marius made himself consul against Sertorius’s wishes and contrary to law, when Carbo, Norbanus, and Scipio fought unsuccessfully against Sylla, now advancing to Rome, when much was lost by the cowardice and remissness of the commanders, but more by the treachery of their party, when with the want of prudence in the chief leaders, all went so ill that his presence could do no good, in the end when Sylla had placed his camp near to Scipio, and by pretending friendship, and putting him in hopes of a peace, corrupted his army, and Scipio could not be made sensible of this, although often forewarned of it by Sertorius, at last he utterly despaired of Rome, and hasted into Spain, that by taking possession there beforehand, he might secure refuge to his friends, from their misfortunes at home. Having bad weather in his journey, and traveling through mountainous countries, and the inhabitants stopping the way, and demanding a toll and money for passage, those who were with him were out of all patience at the indignity and shame it would be for a proconsul of Rome to pay tribute to a crew of wretched barbarians. But he little regarded their censure, and slighting that which had only the appearance of an indecency, told them he must buy time, the most precious of all things to those who go upon great enterprises; and pacifying the barbarous people with money, he hastened his journey, and took possession of Spain, a country flourishing and populous, abounding with young men fit to bear arms; but on account of the insolence and covetousness of the governors from time to time sent thither from Rome, they had generally an aversion to the Roman supremacy. He, however, soon gained the affection of their nobles by intercourse with them, and the good opinion of the people by remitting their taxes. But that which won him most popularity, was his exempting them from finding lodgings for the soldiers, when he commanded his army to take up their winter quarters outside the cities, and to pitch their camp in the suburbs; and when he himself, first of all, caused his own tent to be raised without the walls. Yet not being willing to rely totally upon the good inclination of the inhabitants, he armed all the Romans who lived in those countries that were of military age, and undertook the building of ships and the making of all sorts of warlike engines, by which means he kept the cities in due obedience, showing himself gentle in all peaceful business, and at the same time formidable to his enemies by his great preparations for war.

As soon as he was informed that Sylla had made himself master of Rome, and that the party which sided with Marius and Carbo was going to destruction, he expected that some commander with a considerable army would speedily come against him, and therefore sent away Julius Salinator immediately, with six thousand men fully armed, to fortify and defend the passes of the Pyrenees. And Caius Annius not long after being sent out by Sylla, finding Julius unassailable, sat down short at the foot of the mountains in perplexity. But a certain Calpurnius, surnamed Lanarius, having treacherously slain Julius, and his soldiers then forsaking the heights of the Pyrenees, Caius Annius advanced with large numbers and drove before him all who endeavored to hinder his march. Sertorius, also, not being strong enough to give him battle, retreated with three thousand men into New Carthage, where he took shipping, and crossed the seas into Africa. And coming near the coast of Mauritania, his men went on shore to water, and straggling about negligently, the natives fell upon them and slew a great number. This new misfortune forced him to sail back again into Spain, whence he was also repulsed, and, some Cilician pirate ships joining with him, they made for the island of Pityussa, where they landed and overpowered the garrison placed there by Annius, who, however, came not long after with a great fleet of ships, and five thousand soldiers. And Sertorius made ready to fight him by sea, although his ships were not built for strength, but for lightness and swift sailing; but a violent west wind raised such a sea that many of them were run aground and shipwrecked, and he himself, with a few vessels, being kept from putting further out to sea by the fury of the weather, and from landing by the power of his enemies, was tossed about painfully for ten days together, amidst the boisterous and adverse waves.

He escaped with difficulty, and after the wind ceased, ran for certain desert islands scattered in those seas, affording no water, and after passing a night there, making out to sea again, he went through the straits of Cadiz, and sailing outward keeping the Spanish shore on his right hand, he landed a little above the mouth of the river Baetis, where it falls into the Atlantic sea, and gives the name to that part of Spain. Here he met with seamen recently arrived from the Atlantic islands, two in number, divided from one another only by a narrow channel, and distant from the coast of Africa ten thousand furlongs. These are called the Islands of the Blest; rains fall there seldom, and in moderate showers, but for the most part they have gentle breezes, bringing along with them soft dews, which render the soil not only rich for plowing and planting, but so abundantly fruitful that it produces spontaneously an abundance of delicate fruits, sufficient to feed the inhabitants, who may here enjoy all things without trouble or labor. The seasons of the year are temperate, and the transitions from one to another so moderate, that the air is almost always serene and pleasant. The rough northerly and easterly winds which blow from the coasts of Europe and Africa, dissipated in the vast open space, utterly lose their force before they reach the islands. The soft western and southerly winds which breathe upon them sometimes produce gentle sprinkling showers, which they convey along with them from the sea, but more usually bring days of moist bright weather, cooling and gently fertilizing the soil, so that the firm belief prevails even among the barbarians, that this is the seat of the blessed, and that these are the Elysian Fields celebrated by Homer.

When Sertorius heard this account, he was seized with a wonderful passion for these islands, and had an extreme desire to go and live there in peace and quietness, and safe from oppression and unending wars; but his inclinations being perceived by the Cilician pirates, who desired not peace nor quiet, but riches and spoils, they immediately forsook him, and sailed away into Africa to assist Ascalis, the son of Iphtha, and to help to restore him to his kingdom of Mauritania. Their sudden departure noways discouraged Sertorius; he presently resolved to assist the enemies of Ascalis, and by this new adventure trusted to keep his soldiers together, who from this might conceive new hopes, and a prospect of a new scene of action. His arrival in Mauritania being very acceptable to the Moors, he lost no time, but immediately giving battle to Ascalis, beat him out of the field and besieged him; and Paccianus being sent by Sylla, with a powerful supply, to raise the siege, Sertorius slew him in the field, gained over all his forces, and took the city of Tingis, into which Ascalis and his brothers were fled for refuge. The Africans tell that Antaeus was buried in this city, and Sertorius had the grave opened, doubting the story because of the prodigious size, and finding there his body, in effect, it is said, full sixty cubits long, he was infinitely astonished, offered sacrifice, and heaped up the tomb again, gave his confirmation to the story, and added new honors to the memory of Antaeus. The Africans tell that after the death of Antaeus, his wife Tinga lived with Hercules, and had a son by him called Sophax, who was king of these countries, and gave his mother’s name to this city, whose son, also, was Diodorus, a great conqueror, who brought the greatest part of the Libyan tribes under his subjection, with an army of Greeks, raised out of the colonies of the Olbians and Myceneans placed here by Hercules. Thus much I may mention for the sake of king Juba, of all monarchs the greatest student of history, whose ancestors are said to have sprung from Diodorus and Sophax.

When Sertorius had made himself absolute master of the whole country, he acted with great fairness to those who had confided in him, and who yielded to his mercy; he restored to them their property, cities, and government, accepting only of such acknowledgments as they themselves freely offered. And whilst he considered which way next to turn his arms, the Lusitanians sent ambassadors to desire him to be their general; for being terrified with the Roman power, and finding the necessity of having a commander of great authority and experience in war, being also sufficiently assured of his worth and valor by those who had formerly known him, they were desirous to commit themselves especially to his care. And in fact Sertorius is said to have been of a temper unassailable either by fear or pleasure, in adversity and dangers undaunted, and noways puffed up with prosperity. In straightforward fighting, no commander in his time was more bold and daring, and in whatever was to be performed in war by stratagem, secrecy, or surprise, if any strong place was to be secured, any pass to be gained speedily, for deceiving and overreaching an enemy, there was no man equal to him in subtlety and skill. In bestowing rewards and conferring honors upon those who had performed good service in the wars he was bountiful and magnificent, and was no less sparing and moderate in inflicting punishment. It is true that that piece of harshness and cruelty which he executed in the latter part of his days upon the Spanish hostages, seems to argue that his clemency was not natural to him, but only worn as a dress, and employed upon calculation, as his occasion or necessity required. As to my own opinion, I am persuaded that pure virtue, established by reason and judgment, can never be totally perverted or changed into its opposite, by any misfortune whatever. Yet I think it at the same time possible, that virtuous inclinations and natural good qualities may, when unworthily oppressed by calamities, show, with change of fortune, some change and alteration of their temper; and thus I conceive it happened to Sertorius, who when prosperity failed him, became exasperated by his disasters against those who had done him wrong.