Marcus Ulpius Traianus (AD 56–117)

He always marched on foot with the rank and file of his army, and he attended to the ordering and disposition of the troops throughout the entire campaign, leading them sometimes in one order and sometimes in another; and he forded all rivers that they did. Sometimes he even caused his scouts to circulate false reports, in order that the soldiers might at one and the same time practise military manoeuvres and become fearless and ready for any dangers.

After the death of Augustus, the Roman Empire gained little new territory. Throughout the remainder of the first century AD a number of allied kingdoms were annexed to become directly ruled provinces, but the only major new conquest came when Claudius sent an army to invade Britain in AD 43. The great conquerors of the last decades of the Republic had also been the principal leaders in the civil wars which had torn the State apart, and it was simply too great a risk for an emperor to permit any of his commanders to win fame and glory in a similar way. It was absolutely vital that the military achievements of the princeps never be overshadowed by those of any other senator. Even Augustus had sacked a Prefect of Egypt who had celebrated his victories too boldly, and forced him to commit suicide, though the man in question had only been an equestrian and not a member of the Senate. Tiberius, Vespasian and Titus already had distinguished military records before they came to the throne, but Caligula, Claudius, Nero and Domitian had not this advantage and were thus even more reluctant to permit potential rivals to gain too much prestige. We have already seen how Claudius recalled Corbulo from beyond the Rhine rather than permit him to expand the war and reoccupy part of the German province lost in AD 9. The same emperor made sure that he was in at the kill for the culmination of the first campaign of his British expedition in AD 43.

Claudius spent less than a fortnight in Britain, but was present at a major defeat of the Britons north of the Thames and the capture and occupation of the tribal capital at Camulodunum (Colchester). How active a role he actually played in the running of any of these operations is questionable, but it is significant that he felt it was worth considerable travel and six months away from Rome to preside over the army’s success. Brief though the visit was, it helped to associate the emperor very personally with the subjugation of a mysterious island visited, but not conquered, by Julius Caesar. Claudius was then able to return to Rome and ride in triumph along the Sacra Via, something emperors did not normally do as a result of the victories won vicariously through their legates. In the flood of propaganda, which included games, the construction of a number of monuments, and both Claudius and his son adopting the name Britannicus, it was always made clear that this was the emperor’s victory. For a man whose reign had begun when he was discovered hiding behind a curtain in the chaos following Caligula’s murder and raised to power by the praetorian guard in spite of the wishes of the Senate, it was a great proof of his right and capacity to be Rome’s first citizen.

In the long run, the political system created by Augustus discouraged further expansion of the Empire. Most emperors were reluctant to spend the long periods of time on campaign carrying out fresh conquests and did not trust anyone else to do this for them. Some authors in Augustus’ day were in any case already proclaiming that Rome controlled all the best and most prosperous parts of the earth and that further expansion would prove more costly than any profits it might yield. There was some truth in this, although the suggestion put forward by some modern scholars that the Romans stopped expanding because they now bordered on peoples whom their military system could not readily defeat is not supported by the evidence. Yet it is certainly true that the professional army as constituted under the Julio-Claudians could not quickly or easily be expanded in size to provide troops for new military adventures. Conscription was deeply unpopular, as Augustus had found in AD 6 and 9, and avoided if at all possible by all subsequent emperors. The imperial army was on average a far more efficient fighting force than the pre-Marian militia, but it lacked the seemingly limitless pool of reserve manpower which had proved such a strength in the Punic Wars.

Under the Principate the army’s main roles were controlling the provinces – a task which involved them in everything from minor policing to putting down rebellions – and securing the frontiers, usually achieved by a combination of diplomacy and the aggressive domination of neighbouring peoples through real or threatened punitive expeditions against them. Wars of conquest were rare, although the ideology of the Empire and its rulers remained for centuries essentially one of expansion. It was still considered a fundamentally good thing for the imperium of Rome to increase, but as had always been the case, this did not necessarily require the acquisition of more territory. Roman power could be respected in a region even when it was not physically occupied by the army or governed by a Roman official, and many areas which were never controlled in this way were still felt by the Romans to be part of their empire. The determination to protect and increase Rome’s imperium provided the motivation for most of the wars fought under the Principate.

Domitian spent several years supervising his armies fighting on the Rhine and Danubian frontiers, although it seems unlikely that he ever exercised direct battlefield command. A line of frontier forts was established in Germany further forward than had been the case in the past, but only a relatively small area was annexed in this way. In the main these conflicts were especially large-scale versions of the frequent campaigns to maintain Roman dominance over the tribes bordering on her frontier provinces. Dacia was invaded in response to heavy raids on the province of Lower Moesia, but it is unlikely that permanent occupation was anticipated, and in the event the operations there met with little success. One army – commanded by the Praetorian Prefect Cornelius Fuscus, much to the annoyance of the Senate who felt that any army ought to be led by a member of their class and not a mere equestrian – was defeated, and perhaps annihilated, by the Dacians in AD 86. Domitian’s relationship with the senatorial class steadily worsened throughout his principate, denying him the popularity – and favourable treatment in our sources which were mainly written by senators for senators – of his father and brother. In the end he was murdered in AD 96 through a palace conspiracy and replaced by the Senate with one of their own members, the elderly Nerva.

Nerva was the first of what Edward Gibbon termed the ‘five good emperors’ who presided over the Roman Empire at the height of its power and prosperity in the second century AD. He was succeeded by Trajan, who devoted much of his efforts to renewed expansion. His conquest of Dacia grew from Domitian’s unsatisfactory campaigns in the area and had its root in frontier problems. In contrast the invasion of Parthia and the march to the Persian Gulf had little motive beyond the traditional desire of a Roman aristocrat to win glory by defeating powerful enemies.


Trajan was born and brought up at the city of Italica in Spain. His family claimed descent from some of the original Roman and Italian troops who formed this colony established by Scipio Africanus after his victory at Ilipa in 206 BC. Italica prospered and grew to be one of the largest and most important cities in Spain. Its citizens seem to have had Latin status, although the local aristocracy could gain full Roman citizenship through the holding of local magistracies. If they had sufficient wealth – and political success even at a local level always required money – then these families were able to become equestrians and send some of their sons into imperial service. Over time some gained the riches and favour to enter the Senate. In the first century BC, especially under Augustus, many Italian noblemen were made senators. Under his successors a growing number of men from the provinces joined the House. Some of these men were descendants of Roman colonists, but an increasing number were drawn from the indigenous aristocracy who had been granted citizenship. Claudius introduced a number of Gauls into the Senate. By the end of the first century there were also men from Spain, North Africa and the Greek east.

All of these men were Romans, both in law and in culture, regardless of their ethnic background, and their behaviour in public life differed in no significant way from that of senators of Italian or strictly Roman ancestry. Under the Principate Rome’s ruling élite gradually absorbed the rich and powerful of most of the provinces without losing its traditional ethos. This process did a great deal to make widespread rebellion extremely rare throughout most of the provinces, save for those where the local aristocracy remained outside the system. Trajan was the first emperor whose link with Italy was extremely distant. He was succeeded by his cousin Hadrian, another Spaniard whose provincial accent earned the scorn of many other senators when he first came to Rome. Near the end of the century the throne would be seized by Septimius Severus, a senator from Lepcis Magna in North Africa. Later there would be Syrian, Greek, Pannonian and Illyrian emperors.

Trajan’s father and namesake, Marcus Ulpius Traianus, had had a fairly distinguished senatorial career, although it is not clear whether he was the first of the family to enter the Senate. In AD 67 he was the legionary legate commanding X Fretensis under Vespasian during the campaign in Galilee, and supported him during the Civil War. This brought him a consulship, perhaps in AD 70, and appointment as legatus Augusti first of Cappadocia and then of Syria. During this time there appears to have been some friction with the Parthians and Traianus’ skilful handling of this affair led to his being awarded triumphal ornaments. It is uncertain whether the operations involved actual fighting or just vigorous diplomacy. During these years the family was granted patrician status. Scarcely any genuine patricians still survived by this time, for such prominent men had inevitably suffered much in the purges of successive emperors, and Vespasian had decided to create new patricians to add dignity to his Senate. Most of the beneficiaries were men who had shown themselves to be reliable during the Civil War, including the family of Tacitus’ future father-in-law, Julius Agricola.

Trajan’s own upbringing appears to have been fairly conventional by the standards of the senatorial class, although it was claimed that he proved no more than adequate at rhetoric and other academic pursuits. At an early age he developed a passion for hunting which persisted throughout his life, and excelled at physical and especially military exercises. At the end of his teens, probably around AD 75, he became a senatorial tribune (tribunus laticlavius) in one of the legions in Syria, serving under his father’s command in the manner of many young aristocrats. Later he transferred to a legion on the Rhine frontier and saw further service against the local tribes. Some tribunes were notorious for wasting their military tribunate, but Trajan embraced the military life with great enthusiasm and served for far longer than was usual. The Younger Pliny in his Panegyric – a written version of a speech praising the emperor and originally delivered in the Senate – claimed that he served for ten years, the traditional term required to make a man eligible for political office in the Republic. This may be an exaggeration, but his account of Trajan’s time as tribune may well give an accurate picture of the enthusiastic young officer:

As a tribune … you served and proved your manhood at the far-flung boundaries of the empire, for fortune set you to study closely, without haste, the lessons which you would later teach. It was not enough for you to take a distant look at the camp, stroll through a short period of duty: while a tribune you desired the qualifications for command, so that nothing was left to learn when the moment came for passing on your knowledge to others. Through ten years’ service you learnt the customs of peoples, the localities of countries, the opportunities of topography, and you accustomed yourself to cross all kinds of river and endure all kinds of weather … So many times you changed your steed, so many times your weapons, worn out in service!

A number of civil posts followed this spell in the army, until in the late 80s AD Trajan became the legate of Legio VII Gemina at the town of Legio (the root of its modern name, Léon) in the peaceful province of Hispania Tarraconensis. In AD 89 Lucius Antoninus Saturninus, the legate of Germania Superior, rebelled against Domitian. Trajan was ordered to march from Spain to confront the rebel army. In the event he did not arrive before Saturninus had been defeated, but his loyalty and prompt action won him the emperor’s trust. It seems that his legion remained on the Rhine and mounted a successful punitive expedition against a German tribe – perhaps the Chatti who had made an alliance with Saturninus. In the 90s he gained a further reputation as a commander, and served as a provincial legate, perhaps in both Germania Superior and Pannonia on the Danube. During his tenure in the latter he fought and defeated some of the Suebic tribes. When Domitian was murdered and Nerva elevated to the throne, Trajan was widely respected as one of the gifted generals of an age for active service – he was then in his fortieth year. Facing pressure from the praetorians who demanded the punishment of Domitian’s murderers, and probably nervous of rivals emerging from amongst the provincial legates, in AD 97 Nerva adopted Trajan, marking him out as his heir. The choice was a popular one, especially with the army, and did much to secure the new regime. A year later Nerva died and Trajan became emperor. Within a year he was touring the Danubian frontier, and in 101 he began a major campaign in this area, aimed at the defeat of King Decebalus of Dacia.


In 58 BC Julius Caesar had considered attacking Dacia (an area roughly equivalent to modern-day Transylvania) until the Helvetii gave him an even more attractive alternative opportunity for winning military glory. Only his murder in 44 BC prevented a revival of his original plan for such a war from being fulfilled. The Dacians were at that time united under the rule of Burebista, a charismatic war leader who controlled a far larger force of warriors than most tribal leaders. Not long after Caesar’s death the Dacian king was himself assassinated, and no comparably strong ruler emerged amongst his people for over a century. This changed when Decebalus rose to power in the last decades of the first century AD, once again massing a strong force of warriors – he was especially keen to recruit deserters from the Roman army – and subjecting many neighbouring peoples, such as the Sarmatians and Bastarnae, to his rule. Dio described him in conventional terms as the ideal commander, who was:

shrewd in his understanding of warfare and shrewd also in the waging of war; he judged well when to attack and chose the right moment to retreat; he was an expert in ambuscades and a master in pitched battles; he knew not only how to follow up a victory well, but also how to manage a defeat.

Under Decebalus’ aggressive leadership the Dacians had raided across the Danube, and inflicted serious defeats on the Romans. Domitian’s campaign against them ended in a deeply unsatisfactory way with a treaty by which the Romans paid Decebalus an annual indemnity and provided him with engineers and artillery to strengthen the fortifications of his realm. Such terms indicated that Rome had not won the war and even hinted that she had lost, and added to Domitian’s unpopularity with the Senate. When Trajan launched an invasion of Dacia in AD 101, its main aim was to achieve a far more satisfactory peace, based on a Roman victory which would allow the imposition of an appropriate treaty, making Rome’s superiority over Dacia obvious to all. At first he does not appear to have planned to annex the kingdom.

Trajan subsequently wrote Commentaries describing his Dacian Wars, but only a few tiny fragments of these have survived. Cassius Dio, a senator of Greek extraction who wrote in the early third century AD, provides our best narrative of these operations, but even this remains only in the form of epitomes produced centuries later and lacking detail. A few other sources provide a little information, but it is impossible to produce a narrative of this conflict in anything like the detail of the other campaigns examined so far. The spoils from the conquest of Dacia funded the great Forum complex later constructed by Trajan in Rome. Little of this has survived beyond its massive centrepiece, a column 100 Roman feet high (97 feet 9 inches), decorated with a sculpted spiral frieze telling the story of the wars. Several hundred scenes depicting thousands of individual figures of Roman soldiers and their enemies were laid out to form a clear narrative. Originally it was highly colourful, the figures painted and equipped with miniature bronze weapons, the sculpture incorporating levels of detail which cannot possibly have been visible to the observer at ground level.

Trajan’s Column tells a story, but it is a narrative which we can read only with difficulty. The task would be similar to looking at the Bayeux Tapestry, but without the captions and with only the haziest idea of the events and personalities of the Norman Conquest. Although many attempts have been made to relate the reliefs to the topography of Romania and to reconstruct the course of the wars in detail, none of these have ever carried much conviction and can never move beyond conjecture. Yet in another sense Trajan’s Column provides us with a fascinating glimpse of how Roman commanders liked to be depicted in art. A range of artistic conventions influenced its style, but much of it drew on a centuries-old tradition of Roman triumphal art, for generals riding in triumph through the city almost invariably included in their processions paintings showing their own and their armies’ deeds. Such pictures were often used to decorate temples or other monuments constructed with the spoils of war. The Trajan of the Column represents the ideal commander of Roman art, and it is interesting to compare this to the literary figure of the great general. Scenes from another monument at Adamklissi in Romania probably also show episodes from the war, but the story they tell is even harder to reconstruct. Trajan may be one of the officers depicted in the Adamklissi metopes, but these are too badly weathered to allow definite recognition.

Preparations for the campaign were extensive and probably occupied at least a year. Ultimately nine legions – at full strength or at least in the form of a substantial vexillation – were concentrated on the Danube to take part in or support the operations. Other legions sent smaller vexillations and the already substantial auxiliary forces of the region were augmented by whole units and detachments from other provinces. Perhaps a third of the Roman army as then constituted was to take part in the war, although these troops were never massed in a single field army but operated in a number of separate forces and in supporting roles. It was a formidable force, but the task ahead of them would not prove easy. Dacia was defended by the natural strength of the Carpathians. The kingdom was rich in gold deposits and Decebalus had used this wealth to create a large army and to establish well-fortified strongholds controlling the main passes through the mountains. Excavation at a number of these sites has confirmed their formidable nature, with walls and towers which combined native, Hellenistic and Roman methods of construction.

Dacian warriors were brave, though perhaps no more disciplined than those of other tribal peoples. Their religion, based around the worship of the god Zalmoxis, often prompted men to commit suicide rather than surrender. In battle few appear to have worn armour, apart from the allied Sarmatian cavalry who fought as cataphracts, with both horse and man covered in metal or horn armour. Weapons consisted of bows, javelins, Celtic-style swords, and also the scythe-like falx, a two-handed curved sword with the blade on the inner side and ending in a heavy point. This last weapon was capable of reaching past a shield to inflict terrible wounds, and appears to have encouraged some Roman legionaries to be equipped with greaves and an articulated guard to protect their exposed right arm.

Trajan’s Column begins with scenes showing the Roman frontier posts along the Danube and a force of legionaries marching behind their massed standards over a bridge laid across river barges – the Roman equivalent of a pontoon bridge. Then the emperor appears, holding a consilium of senior officers to discuss the forthcoming operations. Trajan usually appears to be slightly larger than the men around him, but he never dominates by sheer size in the manner of the monumental art of other ancient rulers, such as the pharaohs of Egypt. High-level planning and the issuing of orders to the army’s high command is followed by other preparations from the campaign. His head veiled in accordance with his office as pontifex maximus, Rome’s senior priest, the emperor puts a circular ritual cake, or popanum, on to the flames of an altar, as around him the rite of the suovetaurilia is performed with the sacrifice of a bull, a ram and a boar to Mars. This important ceremony was held outside the ramparts of the army’s camp near the start of any major campaign to purify the troops and ensure the support of Rome’s deities. Just as they did in political life in Rome itself, magistrates played a central part in the regular religious ceremonies of the army. There is then a curious scene which shows Trajan watching a peasant clutching a large circular object fall off a mule, and which may be connected with an anecdote in Dio in which allied tribes sent a message to the emperor written in Latin on an enormous mushroom. Then the commander mounts a tribunal and makes a speech to a parade of his legionaries, an address known as an adlocutio. Afterwards the soldiers fortify several positions – presumably on the enemy bank of the Danube – the emperor moving amongst them as they labour and supervising the work.

Its crossing place secure, the main army advances into the hills, probably moving towards the pass in the Carpathians known as the Iron Gates. Trajan and one of his officers are shown inspecting an enemy hill fort, which appears to have been abandoned, before he returns to oversee a group of legionaries clearing a path through the thick woodland. A prominent theme on the Column, as indeed in much literature, is the engineering skill and dogged perseverance of the citizen soldiers of the army, and very often Trajan and his officers are shown overseeing the labour. He is also shown interrogating a Dacian prisoner, just as Caesar and other commanders had done, before the action moves rapidly on to the first major battle. In this the legionaries are shown formed up in reserve, whilst the auxiliaries, who include amongst their number bare-chested barbarians – probably Germans or perhaps even Britons from the irregular units known as numeri – wielding wooden clubs, do the actual fighting.

The savagery of these non-citizen soldiers is emphasized in this and other scenes. One regular auxiliary infantryman grips in his clenched teeth the hair of an enemy’s severed head so that his hands are free to keep fighting. To the rear two more auxiliaries present severed heads to the emperor. In this scene Trajan appears to look away, but in a later, similar scene, he is shown reaching out to accept two such ghastly trophies. The Romans had outlawed headhunting in the provinces of the Empire, but it was evidently acceptable for soldiers to practise this when fighting against foreign enemies. Yet with one possible exception, only auxiliaries are shown on the Column taking heads and it seems likely that such behaviour was acceptable amongst these less civilized troops, but not amongst legionaries.

The bringing of trophies to the commander echoes incidents in the literature, such as the cavalryman at Jerusalem who picked up a rebel and brought him to Titus. The general, and even more the emperor, could reward such heroic feats and his role as witness to his men’s behaviour was vital. Such a task meant keeping relatively close to the fighting, so that the men believed that they could be seen as individuals. One of Domitian’s generals is supposed to have ordered his men to paint their names on their shields to make themselves feel more visible. Later on the Column Trajan is shown distributing rewards to auxiliary troops, although other evidence suggests that these men no longer received medals (dona) like the legionaries so that the awards must have taken another form. Auxiliary units gained battle honours, and sometimes an early grant of the citizenship which was normally given on discharge, so perhaps promotion and sums of money or plunder were the most common form of reward to an individual auxiliary soldier.

This first battle probably took place near Tapae, where in AD 88 one of Domitian’s generals had won a victory which did something to remove the shame of Cornelius Fuscus’ defeat. A god hurling thunderbolts at the Dacians is shown at the top of the frieze, but it is unclear whether this is simply intended to show Rome’s deities fighting on her behalf or indicates an action fought during, or perhaps terminated by, a storm. Some commentators have suggested that the reliance on auxiliaries to do the fighting whilst the legionaries remain in reserve reflected a Roman desire to win victories without the loss of citizen blood. Tacitus praised Agricola for winning the battle of Mons Graupius in this way, but in fact such a sentiment is rarely expressed.


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