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.
It does seem to have been fairly common by the late first century AD to form the first line of infantry from auxiliary troops, whilst the legions formed the second and subsequent lines. This was certainly logical, for the higher organization of the legions, with ten cohorts coming under the command of a legate and being used to operating together (unlike auxiliary cohorts which were all independent units), made them easier for the army commander to control. For this reason legionaries were more effective as reserve troops to be committed as and when the fighting line needed reinforcement. In some cases, the battle may have been won by the auxiliaries without the need for any reserves. It is impossible to tell whether this was the case at Tapae in AD 101. It is equally possible that the sculptors chose simply to represent the opening phase of the battle begun when auxiliary infantry and cavalry launched an attack on the enemy. Dio tells us that the fighting was extremely fierce and that victory cost the Romans heavy casualties. When the Roman medical aid stations – medics are shown treating soldiers in one of the later scenes on the Column – ran out of bandages, Trajan sent them much of his own store of clothes to cut into strips and make up the shortage. To commemorate the fallen, he also established an altar on the site of the battle.
Following up on their success, the Romans are shown continuing the advance and putting captured settlements to the torch. The parapet of one Dacian fort is shown decorated with a row of heads mounted on poles, whilst in front of the rampart are stakes concealed in pits, resembling the ‘lilies’ made by Caesar’s men at Alesia. Dio tells us that in one such captured fort the Romans found standards and equipment captured from Fuscus’ army. The Romans then cross a river, this time without the benefit of a bridge. One legionary is shown wading through the water with his armour and equipment carried in the rectangular shield raised over his head. After this Trajan addresses another parade, before meeting with a group of Dacian ambassadors, and subsequently a group of native women. Then the action moves to another area as the Column shows Dacian warriors and Sarmatian cataphracts swimming – and in some cases drowning in the attempt – across the Danube to attack some Roman garrisons held by auxiliary troops. One group of enemies employ a battering ram with an iron tip shaped like the animal’s head in an effort to breach a fort’s wall, and this may perhaps be an indication of the knowledge of siege techniques which Decebalus had acquired from deserters and the treaty with Domitian.
In response to this new threat, we see Trajan and a mixture of praetorian guardsmen and auxiliaries embarking on a warship and a barge. They are bareheaded, wearing travelling cloaks (paenulae) and burdened with bundles – perhaps folded tents or simply supplies. The force moves along the Danube, then disembarks. Trajan is always at their head, and rides with a group of auxiliary infantry, cavalry and barbarian irregulars to hunt for the enemy raiding force. Two auxiliary cavalrymen seem to report to the emperor – presumably scouts who have found the Dacians – and this is followed by a massed Roman cavalry attack. Surprise appears complete – the goddess of Night is shown at the top of the scene suggesting an attack under cover of darkness – and the Sarmatians and Dacians are routed and cut down around their four-wheeled wagons. Caesar noted that Gallic armies were always accompanied by carts carrying their families, and it is possible that the Dacians followed a similar practice. However, it may be that these scenes represent not a raiding force, but a migration by some of the local peoples, perhaps tribes allied to Decebalus.
The Adamklissi metopes also show fighting around barbarian wagons and a dramatic Roman cavalry charge led by a senior officer, perhaps Trajan himself. Although cruder in style, these reliefs are less stylized than those on the Column and appear to show three distinct types of barbarian, probably Sarmatians, Bastarnae and Dacians. It is possible that the Adamklissi metopes correspond with these scenes on the Column, but they might equally depict entirely different events.
After this Roman victory Trajan is seen receiving another Dacian embassy, this time consisting of aristocratic ‘cap-wearers’ (pileati) rather than the socially inferior warriors who were sent by Decebalus at the start of the war. Dio mentions several attempts at negotiation, which failed due to Decebalus’ mistrustful nature and, most likely, the uncompromising nature of Roman demands. This is followed by a major battle, in which legionaries are shown fighting alongside auxiliaries. The Roman troops are supported by a scorpion mounted in a cart drawn by a team of two mules and known as a carroballista. Trajan supervizes from behind the fighting line, an auxiliary presenting him with a captive – perhaps one he had captured personally. Behind him is the famous field dressing-station scene, which may mean that Dio’s story about the bandages should be associated with this battle rather than the earlier encounter. As always with the Column, we simply cannot know.
After the defeat of the Dacians – many of whom are shown held captive in a compound – Trajan mounts a tribunal to address his paraded soldiers, and then sits on a folding camp chair to dole out rewards to brave auxiliaries. Yet in the midst of these scenes of Roman celebration is a bleaker scene off to the side, where several bound, naked men are brutally tortured by women. The men are most probably captured Roman soldiers and the women Dacians – in many warrior societies the task of humiliating and killing with torture enemy captives has often been performed by the women of the tribe. The scene may well be intended to show that the war was still not finished, for such a savage enemy needed to be defeated utterly.
At this point the narrative of the Column contains a clear break, perhaps indicating the end of the first year’s campaigning, so that subsequent scenes should be assigned to AD 102. Another river journey is shown, then a column of legionaries marches across a bridge of boats and two Roman armies join together. In these and the following sections we see Trajan formally greeting arriving troops, making speeches to parades, taking part in another suovetaurilia sacrifice to Mars, receiving Dacian embassies, and accepting a prisoner or other trophies brought to him by soldiers. As the army advances through the mountains, making roads, building forts, fighting battles and besieging forts, the emperor is always with them, watching, directing and inspiring. He does not wield a tool or a weapon to join the soldiers in their tasks, for his role is to direct their efforts rather than share in them. Eventually the Romans overcome the difficult terrain and their stubborn and ferocious enemies. The First Dacian War ends with the formal surrender of Decebalus and the Dacians, kneeling or standing as suppliants before the emperor, who sits on a tribunal surrounded by the massed standards of his praetorian guard. Then Trajan stands on this or another tribunal to address his parading soldiers. Trophies and the goddess Victory mark the end of the conflict.
The peace was to prove temporary. Decebalus agreed to the loss of some territory, gave up his siege engines and engineers, handed over Roman deserters and promised not to recruit any more of these. In most respects the war had ended in an entirely satisfactory way for the Romans, with their enemy reduced to the status of a subordinate ally, and Trajan was justified in taking the honorary title Dacicus. Yet in the following years Decebalus broke most of the terms, beginning to rebuild his army and strengthen his power, occupying some of the lands of the Iazyges, a Sarmatian people, without seeking Roman approval for this expansion. The king was clearly not behaving in an appropriate manner for a Roman ally and war, which was threatened in 104, was openly renewed in 105 when the Dacians began to attack some Roman garrisons. The commander of the most important garrison, Cnaeus Pompeius Longinus – a former legatus Augusti who may still have been holding this rank – was treacherously imprisoned during negotiation. However, Decebalus’ attempts to use him as a hostage came to nothing when the Roman managed to obtain poison and committed suicide. At some point the Dacian also enlisted a group of deserters to assassinate the emperor, but this plan also failed.
Trajan was in Italy when the Second Dacian War erupted, and the Column’s narrative begins with his voyage across the Adriatic to be greeted by local dignitaries and the wider population. Two scenes of sacrifice follow. Even greater forces seem to have been mustered for the Second War. Trajan raised two new legions which were named after him, II Traiana Fortis and XXX Ulpia Victrix, both of which probably served in the Second War, although it is unclear whether they took part in the First. In the conventional Roman way the emperor combined force with vigorous diplomatic activity in AD 105, accepting the surrender of individual Dacian chieftains who abandoned their king, and negotiating with ambassadors from all neighbouring peoples. Decebalus appears to have had far fewer allies as a result. Even so the Column shows a heavy attack against some auxiliary outposts, which held out until relieved by a force led by Trajan himself.
The main Roman offensive may not have been launched until 106, and most probably followed a different route to the earlier campaign. It began with another sacrifice on the bank of the Danube, before the army crossed the river at Dobreta. This time they did so not on a temporary bridge of boats, but on a monumental arched bridge, built in stone and timber and supported by twenty piers each 150 feet high, 160 feet in width and 170 feet apart. It was designed by Apollodorus of Damascus – who would later plan Trajan’s Forum complex and presumably had much to do with the construction of the Column – and built by the soldiers. A roadway was cut into the cliffs of the Danube to permit easier approach to the bridge. Dio’s account describes this feat of engineering in loving detail strongly reminiscent of Caesar’s account of his bridge across the Rhine. It was a great and magnificent victory for Roman engineering, in its way as admirable to the Romans as any feat of arms. The Column provides a detailed, if stylized depiction of the bridge as the background to the scene of sacrifice.
After this Trajan joins the army – the soldiers are shown cheering him enthusiastically, much as Velleius described the legionaries welcoming Tiberius – takes part in another suovetaurilia purification ceremony, with the ritual processions walking round the camp, and then addresses legionaries and praetorians at a parade. At a consilium, Trajan briefs and discusses the campaign with his senior officers. The usual preliminaries over, the army advances, harvesting grain from the fields to supplement their supplies. The Column suggests some fighting, though not perhaps as much as in the First War, and Dio tells the story of an auxiliary cavalryman who, discovering that his wounds were mortal, left the camp to rejoin the battle and died after performing spectacular feats of heroism. The culmination of the campaign was the siege of Sarmizegethusa Regia, the religious and political centre of the Dacian kingdom set high in the Carpathians. After a stiff resistance, and it seems an unsuccessful Roman assault, the defenders despaired and set fire to the town before taking poison. The war was not quite over, but its issue was no longer in doubt as the Romans pursued the remaining Dacians. Decebalus was eventually cornered by a group of Roman cavalry scouts, but slit his own throat rather than be taken alive.
The leader of the Roman patrol was a certain Tiberius Claudius Maximus, who had joined the army as a legionary before becoming a junior officer in the auxilia. On the Column he is depicted reaching out to Decebalus, and by chance his tombstone has survived, carrying an inscription describing his career and giving another version of the scene. Decebalus was beheaded and the head taken back to Trajan, who ordered it to be paraded before the army. The war was over, and victory was completed by the discovery of the king’s treasure, buried in a river bed, after much labour by Roman prisoners.
A new province was created, guarded by two legions supported by auxiliaries and with its main centre at the newly founded colony of Sarmizegethusa Ulpia – a grand city built on fertile land at the foot of the Carpathians, unlike Decebalus’ mountain fastness. Settlers came from many parts of the Empire, but especially the eastern provinces, and Roman Dacia soon prospered. The fate of the Dacians, whether they were completely expelled or simply absorbed in the more normal way, has been the subject of fierce debate in recent centuries, most especially amongst the Romanians – contemporary politics has had a major influence on whether they believe their ancestors to be Romans or Dacians.