Roman navy
The Roman navy, known as the classis, helped build the largest empire the ancient world had ever seen. Yet despite this, the Romans never quite accepted it as their own. Sailors were ranked below even auxiliary soldiers. The navy was considered, in the words preserved from ancient accounts, somewhat "un-Roman." How did a land-loving civilization come to command the seas from Britain to the Black Sea? What weapons did they invent to overcome more experienced enemies? And how did a force that once numbered tens of thousands of men eventually fade into irrelevance, leaving Rome defenseless against a resurgent naval power rising from the very ruins of Carthage?
Rome's earliest naval record is thin. A warship is mentioned carrying an embassy to Delphi in 394 BC, but the fleet at that time, if it existed at all, amounted to very little. The traditional founding moment of the Roman navy is placed at around 311 BC, when two new officials called the duumviri navales were tasked with maintaining a fleet. That first fleet numbered just 20 ships, most likely triremes, with each official commanding a squadron of ten. For the generations that followed, the navy served mainly to police the Italian coastline against pirates. Whenever anything larger was required, such as blockading a besieged city, the Romans called on allied Greek cities of southern Italy, the socii navales, to provide ships and experienced crews. The navy's inexperience showed plainly in 282 BC, when Roman forces were beaten by the Tarentines.
In 265 BC, Rome sent its first military expedition outside mainland Italy, targeting the island of Sicily. That move brought it into direct conflict with Carthage, a city with centuries of maritime experience and a formidable fleet. In 261 BC, the Roman Senate ordered the construction of 100 quinqueremes and 20 triremes. According to the historian Polybius, the Romans used a captured Carthaginian quinquereme as their blueprint. The problem was that skilled crews cannot be built as quickly as ships. Roman sailors could not match Carthaginian seamanship, so Roman commanders devised a weapon to sidestep the need for it. The corvus was a long plank fitted with a metal spike, which could be dropped onto an enemy ship to hook it fast. Marines then swarmed across the bridge, turning a sea battle into the kind of hand-to-hand fighting the Roman legionaries excelled at. Under the general Gaius Duilius, the Romans used this device to win their first major naval engagement at the Battle of Mylae in 260 BC. Victories followed at Sulci in 258 BC and Tyndaris in 257 BC, and then at the massive Battle of Cape Ecnomus, where the consuls Marcus Atilius Regulus and Lucius Manlius inflicted a severe defeat on the Carthaginian fleet. The one significant Carthaginian sea victory came at the Battle of Drepana in 249 BC, forcing Rome to finance a new fleet from private donations. By the war's final battle, at the Aegates Islands in 241 BC, the Roman commander Gaius Lutatius Catulus had built crews good enough to defeat the Carthaginians using rams alone, with the corvus long abandoned.
After Rome's naval dominance was established, the fleets were drastically cut. That decision proved costly. Without a strong patrol presence, piracy flourished across the Mediterranean, particularly in Cilicia, fed by money and warships supplied by King Mithridates VI of Pontus. Plutarch recorded that the pirates commanded more than a thousand ships and had captured four hundred cities. Among those taken captive was the young Julius Caesar, held for ransom. More alarming still, the pirates had cut Rome's grain supply lines from Africa and Egypt, threatening famine in the capital. In 74 BC, Marcus Antonius, father of the later Mark Antony, was given extraordinary authority to deal with the pirates. He failed, was defeated off Crete in 72 BC, and died soon after. It took until 67 BC and the passage of the Lex Gabinia to find a solution. That law vested Pompey with sweeping powers and the resources to act decisively. He cleared the Mediterranean of pirates in just three months.
In 56 BC, a Roman fleet fought outside the Mediterranean for the first time. Julius Caesar was subduing the Veneti, a maritime tribe on the Atlantic coast of Gaul, in the waters of Quiberon Bay. The Veneti sailed heavy oak ships with no oars, making them resistant to ramming and taller than the Roman galleys, giving archers the high ground. Caesar's commander, D. Brutus, responded with improvised hooks on long poles that cut the ropes supporting the Veneti sails. Immobile, the ships became easy prey. Caesar then used the English Channel fleet he had built to launch two invasions of Britain. The wars that ended the Roman Republic brought the navy back to center stage in the Mediterranean. Sextus Pompeius, given command of the Italian fleet by the Senate in 43 BC, seized Sicily and used it to blockade the grain route from Africa to Rome. Octavian and his close associate Marcus Agrippa responded by building ships at Ravenna and Ostia, constructing a new artificial harbor at Cumae called Portus Julius, and recruiting more than 20,000 freed slaves as rowers. Agrippa introduced the harpax, a catapult-fired grappling hook far more effective than the old corvus, which helped defeat Sextus at the Battle of Naulochus in 36 BC. Five years later, at the Battle of Actium in 31 BC, Antony assembled 500 ships against Octavian's 400. Octavian's victory ended both the civil wars and the Roman Republic, and left the Mediterranean with a single master.
After Actium, Augustus burned much of Antony's captured fleet and organized the remainder into a permanent force. Two large praetorian fleets were based at Misenum and Ravenna, both established in 27 BC, positioned to serve as a central naval reserve directly answerable to the emperor. A network of provincial fleets grew alongside them, placed on the frontiers where they mattered most. The Classis Germanica, founded in 12 BC by Drusus at Castra Vetera, patrolled the Rhine and ventured into the North Sea. In 12 BC, Drusus ordered the construction of a fleet of 1,000 ships, sailed them along the Rhine into the North Sea, and forced the Frisii and Chauci to surrender. By 5 BC, Roman formations had reached as far as the northeastern coast of Denmark. Augustus himself boasted in his Res Gestae that his fleet sailed from the mouth of the Rhine as far as the lands of the Cimbri, where no Roman had previously gone by land or sea. The Classis Britannica, established around 40 or 43 AD at modern Boulogne-sur-Mer, supported the conquest of Britain and the subsequent campaigns on the island, operating transport runs across the English Channel. The Classis Pontica, founded in 64 AD from the former Pontic royal fleet and based at Trapezus, according to the historian Josephus numbered 40 warships and 3,000 men in the latter half of the first century. Its task was to guard the southern and eastern Black Sea and control access through the Bosporus. Service in these fleets was hard and long. During the early Principate, sailors signed on for a minimum of 26 years, one year longer than the legions, and later that period was extended to 28. Upon honorable discharge, they received a substantial cash payment. Emperor Claudius was the first to grant sailors the right to earn Roman citizenship through their service.
Two centuries of peace on the Mediterranean bred complacency. Naval tactics and technology were neglected, and the Roman naval system had become moribund by the time the third-century crisis struck. From around 230 AD, the empire faced fifty years of relentless seaborne assault. Germanic tribes built a powerful fleet in the Black Sea during the reign of Trebonianus Gallus, and in 256 struck two Roman naval bases simultaneously, seizing ships and extending raids as far as the Aegean. In 267-270, a fleet of Heruli and allied tribes raided Thrace, Pontus, Athens, Corinth, and countless islands. An even larger wave followed in 268-269: the Historia Augusta describes an alliance of Scythians, Greuthungi, Tervingi, Gepids, Peucini, Celts, and Heruli, reportedly fielding 2,000 ships and 325,000 men, who struck Byzantium and raided as far south as Crete. Emperor Claudius II stopped them at the Battle of Naissus. On the northern seas, the writer Eutropius records that in the 280s the coasts of Belgica and Armorica were "infested with Franks and Saxons." Maximian appointed Carausius to command the Classis Britannica against them, but in late 286 Carausius instead declared himself emperor and took Britain and portions of the northern Gallic coast with him, costing Rome control of the Channel at a stroke. It took until 296, when Caesar Constantius Chlorus launched a concentric attack on Londinium, to recover the province. Emperor Diocletian later expanded the fleet's manpower from 46,000 to 64,000 men, but the old standing fleets had effectively dissolved. The historian Priscus and the writer Sidonius Apollinaris both confirm that by the mid-fifth century, the Western Empire essentially had no war navy left. The fleets mobilized against the Vandals in 460 and 468, under the emperors Majorian and Anthemius, were disasters. The Vandal Kingdom, ruling from Carthage, raided unchallenged across the western Mediterranean, even sacking Rome itself, while the remnants of the Roman fleet stood by helpless. The last Western Emperor, Romulus Augustulus, was deposed in 476.
The men who rowed the Roman fleet were not, despite enduring popular myth, slaves. Throughout the navy's history, rowers known as remiges were men of free status. Slaves were used only in extreme emergencies, and even then they were freed before being put to work. In the imperial period, the bulk of crews came from non-citizen freeborn provincials, Greeks, Phoenicians, Syrians, and Egyptians, drawn from peoples with deep maritime traditions. The ships themselves ranged from heavy quinqueremes and, in the earliest period, triremes, to light swift vessels borrowed from the pirates who had once threatened Rome: the liburnian and the hemiolia. After Actium reshaped the fleet's mission toward policing, patrol, and escort, lighter ships dominated. In time, "liburnian" became the Latin word for warship in general. The largest ship kept in active service was a hexareme, reserved as the flagship of the Classis Misenensis. Roman warships were commonly named after gods such as Mars, Minerva, and Isis, or after concepts like Concordia, Pax, and Fides, or after military victories, as when ships were named Dacicus to honor Trajan's Dacian Wars. Command of these fleets was a fundamentally political affair during the Republic, with consuls and praetors in nominal charge. The practical knowledge rested with subordinate officers. Augustus formalized the post of praefectus classis, the fleet prefect. The prefects of the two praetorian fleets earned 200,000 sesterces annually, placing them among the highest-paid military commanders in the empire. The Classis Germanica and Classis Britannica prefects earned 100,000 sesterces, while prefects of smaller fleets received 60,000. It was only in the third century that the navy's professional officers, the trierarchi who commanded individual ships and the nauarchi who commanded squadrons, were formally equated in pay and status with their counterparts in the legions.
Common questions
When was the Roman navy founded?
The traditional founding date of the Roman navy is around 311 BC, when two officials called the duumviri navales were appointed to maintain a fleet. That first fleet consisted of 20 ships, most likely triremes, with each official commanding a squadron of ten.
What was the corvus and how did the Roman navy use it?
The corvus was a long plank fitted with a metal spike that could be dropped onto an enemy ship to lock it in place. Roman marines then used it as a boarding bridge, turning sea combat into hand-to-hand fighting where Roman legionaries had the advantage. It was deployed effectively at the Battle of Mylae in 260 BC under Gaius Duilius but was later abandoned because its weight made quinqueremes unstable in rough seas.
How did Pompey defeat the Mediterranean pirates?
In 67 BC, the Lex Gabinia granted Pompey unprecedented authority and resources to act against the pirates. He launched a coordinated campaign and cleared the pirates from the Mediterranean in only three months.
What were the two main Roman praetorian fleets?
The two praetorian fleets were the Classis Misenensis and the Classis Ravennas, both established in 27 BC and based in Italy. They served as a central naval reserve directly available to the emperor, with duties spanning patrol and transport missions across the entire Mediterranean.
Were Roman galley rowers slaves?
No. Throughout the Roman navy's history, rowers called remiges were men of free status. Slaves were employed only in extreme emergencies, and even then they were freed before serving. In the imperial period, the bulk of crews came from non-citizen freeborn provincials, particularly Greeks, Phoenicians, Syrians, and Egyptians.
Why did the Western Roman navy collapse in the 5th century?
The Western Roman navy declined through a combination of third-century neglect, barbarian seizures of ships, and catastrophic losses. By the mid-fifth century, the historians Priscus and Sidonius Apollinaris both confirm the Western Empire essentially had no war navy. Fleets mobilized against the Vandal Kingdom in 460 and 468, under emperors Majorian and Anthemius, ended in disaster, leaving the Vandals free to raid the western Mediterranean unopposed from their base at Carthage.
All sources
39 references cited across the entry
- 16JournalExercitor and Magister Navis in Roman LawMarija Ignjatović — 2019