The Fall of Pompey

The war that had begun with Caesar’s crossing of the Rubicon now stretched far beyond Italy. Pompey the Great — once master of the seas, long celebrated for saving Rome from famine and pirates — had abandoned the city to his rival and sailed eastward with the Senate at his back. There, in Greece and the rich provinces of the East, in the kingdoms that still looked toward Rome, he would rebuild his strength. The Mediterranean had been the ground of Pompey’s glory: he had swept it clean of pirates, humbled Mithridates, reorganized the East into Roman provinces. Surely there, if anywhere, he would find allies.

And he did. Governors, kings, and client princes brought ships and men. From Syria, Asia, Cappadocia, and Thrace came tribute and soldiers. By the summer of 48 BCE Pompey commanded the sea and boasted an army far larger than Caesar’s. He had more cavalry, more allies, deeper treasuries. The Senate, gathered in his camp, exulted: here at last was the chance to crush the usurper.

But if Pompey had numbers, Caesar had nerve and speed. In the dead of winter, when no one thought a fleet could risk the Adriatic, Caesar attempted the impossible. He ferried seven legions across into Epirus. Storms scattered his ships, supplies were scarce, and Pompey’s fleet prowled the sea lanes; yet Caesar, once ashore, pressed forward before his enemies could combine their forces. His art was the same as in Gaul — move fast, strike first, keep the foe off balance.

At Dyrrhachium that art nearly failed him. There the two armies built and counter-built vast lines of fortification. Caesar stretched himself thin; Pompey, abandoning his usual caution, struck a weak point and drove him back. Caesar himself admits in the Commentarii that fortune deserted him: his lines broke, his men routed, standards lost. In the Senate’s tents there was jubilation. Caesar seemed finished.

Then old fault lines split Pompey’s coalition. The optimates had followed him as their champion but never trusted him. Many feared that if he won too completely he might become another Caesar — a single man towering over Senate and law. Alfred Heuß’s bitter phrase fits their mood: they were dividing the lion’s skin before the lion was slain. Offices, provinces, consulships were already being promised. They pressed Pompey to end the war at once, to force a battle and claim the spoils.

Pompey hesitated. His instincts were Fabian: he had the fleet, the granaries, the larger army. He could starve Caesar out and win without gambling everything on one field. He told intimates that a single stamp of his foot could raise new legions; time was his ally. Hunger, desertion, and weariness would wear Caesar down. The cautious plan might well have worked.

But Pompey was not free. The Senate clamored. Cato, Domitius, Lentulus, and other nobles mocked his delays, whispered that Magnus had lost his nerve. The younger generals of the aristocracy longed for personal glory and demanded action. Their taunts stung. Against his better judgment, Pompey yielded. He would give them the battle they wanted.

The place was the plain of Pharsalus, in the heart of Thessaly. On one side Pompey, with nearly twice the numbers: cavalry massed on his left, infantry stretched wide, senators and nobles glittering in their armor. On the other, Caesar with a smaller but seasoned force — veterans hardened by a decade of campaigning in Gaul, soldiers who trusted their general as they trusted the gods. On 9 August 48 BCE the armies faced one another under a brilliant Thessalian sun, and the future of the Republic hung on that day.

Pompey hoped to use his cavalry to envelop Caesar’s right and crush him. At first the move seemed to succeed: the horsemen, far superior in numbers, pressed hard. But Caesar had quietly prepared a counter. He had stationed reserve cohorts behind his own right and drilled them to strike upward at the enemy horsemen’s faces. At his signal they surged forward, their pila and swords thrusting not at shields but at eyes and cheeks. The unexpected tactic broke the nerve of Pompey’s cavalry; they wavered, then fled. Panic spread down the line. Caesar’s infantry, moving with the discipline forged in Gaul, drove into the collapsing flank and rolled the senatorial ranks backward.

Pharsalus shattered the optimates’ cause. The nobles, brave in council but mostly untrained for real battle, crumbled before Caesar’s professionals. Several legions that had once served under Crassus now fought under Caesar’s eagles and struck with a fury sharpened by years of war. Pompey himself, seeing the disaster unfold, fell into what Plutarch calls a kind of numbness. He gave no clear orders as his army dissolved. In moments the great coalition was broken.

Pompey fled — not as Magnus, the conqueror of pirates and kings, but as a hunted man. He abandoned his cloak, his authority, and rode for the coast. At Lesbos he rejoined his wife Cornelia; together they sailed for Egypt. He believed that there, where once he had decided dynastic struggles and confirmed monarchs, gratitude would shelter him.

But fortune had turned. Egypt was ruled by the boy-king Ptolemy XIII and by courtiers frightened of Caesar’s advance. To harbor Pompey was to risk Caesar’s wrath; to betray him might buy favor. The court chose betrayal. As Pompey’s small vessel approached the shore near Pelusium, familiar faces rowed out to meet him — among them Lucius Septimius, a centurion who had once served under his command. They hailed him with every show of respect and invited him to come ashore.

Weary and wary but clinging to hope, Pompey stepped down into the shallows. There, before Cornelia’s eyes, the assassins struck. Steel flashed; he fell without ceremony. His body was abandoned on the sand. His head was severed and carried away as a token for the new master of Rome.

When Caesar arrived days later, the Egyptians presented the head to him as a gift. He turned aside and wept. Plutarch says he covered his face, grieving not only a rival but a great Roman brought to such an end. It was a death too pitiful for a man who had once saved the Republic from famine and pirates.

With Pompey’s murder the Senate lost its most formidable general. The war did not stop — Cato and Metellus Scipio would rally remnants in Africa, and later Pompey’s son Sextus would fight on in Spain and hold Sicily with a fleet — but the backbone of aristocratic resistance had been broken on the sands of Egypt. What had begun at the Rubicon had now swept away the Republic’s strongest defender, leaving Caesar to face enemies who would never again match Pompey’s reach or prestige.