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Imagine a battlefield in ancient Rome, where a hail of projectiles marked the beginning of each confrontation. The Roman legions, famous for their discipline and adaptability, perfected various throwing weapons throughout their long history. Two of the most emblematic, the pilum and the plumbata, are not only fascinating objects of study, but they also allow us to understand the constant evolution of the Roman army from the height of the Empire to its fall. To check the current offer, you can explore the collection of pilums.
Was there really a decline in the quality of its weaponry, or was it a brilliant adaptation to new challenges? Join us to discover it, exploring the differences, uses and evolution of these two throwing weapons that defined combat in Antiquity.
El Pilum: The True Strike of the Classic Legions
The pilum was an essential weapon for the Roman legionary for centuries. Although the first clearly Roman examples are documented around the 3rd century BC, it is very likely that its use was earlier. This formidable dart became a key piece in the army's combat form.
What was a Pilum like?
In essence, the pilum was an iron rod that ended in a pyramidal tip, attached to a wooden handle. Its dimensions ranged between 1.5 and 2 meters, with a weight of 2 to 5 kilograms. A notable example is the moharra (metallic part) of a heavy pilum found in La Caridad (Teruel), dated around 74 BC, which clearly shows its pyramidal tip and a tongue for insertion into the wooden shaft. While the plumbata could measure between 50 and 60 cm, the pilum could measure between 215 and 225 cm.
The Myth of the Bending Pilum
You've probably heard the myth that the pilum was designed to bend upon impact with enemy shields, rendering them useless. Although it is true that it could curve when hitting a hard object, this was not an intentional design. The reality is that they were made with mild steel, a ductile material that deformed upon impact. What really made the pilum so effective at disabling shields—capable of penetrating up to 3 cm of wood—was its pyramidal head.
Once the wood was drilled, it tended to swell, making it extremely difficult to remove the head, which was larger than the shaft. If the pilum became hooked on the shield, even if it did not bend, the counterweight of the shaft made it unmanageable, forcing the enemy to release it and be at a disadvantage.
Tactical Use of the Pilum
The range of the pilum was limited, just about 30 meters. Because of this, it is believed that soldiers in the front ranks carried a single pilum, while those in the rear ranks might carry a second. The launch of a "rain of pile" plunged the enemy into confusion, a moment that the legionaries took advantage of to draw their swords and charge, using their shields offensively. Its objective was to break the enemy before direct collision, comparable to a modern artillery preparation. The pilum could directly wound the enemy or, by sticking into the shield, render it unusable or immobilize its wearer.
La Lancea: An Intermediate Step
The expansion of Roman borders and the appearance of massive cavalry on the eastern battlefields led to the development of the lancea from the 1st century AD. This weapon, lighter than the pilum and with a smaller, leaf-shaped tip, could be used for both throwing and brandishing. It was adopted by cavalry and later by auxiliary infantry, often carrying one and carrying two smaller ones behind the shield.
The lancet offered a greater range, approximately 80 meters, compared to the pilum, allowing legionaries to react sooner to enemy fire. Although it did not have the same penetration capacity as the pilum, its early use increased disorder in the enemy ranks.
La Plumbata: The Intelligent Dart of the Lower Empire
The true innovation of the late 3rd century AD. was the plumbata, also known as martiobarbulus (Mars Dart). Its name, which means "lead spear", already gives us a clue as to its main characteristic. The Roman plumbata was a type of arrow or spear mounted on a pole with a lead that gave it weight and allowed it to be launched by hand and pierce enemy shields.
Design and Types
The plumbata was a dart or arrow with a lead weight that gave it weight and allowed it to be thrown by hand, passing through enemy shields. The main type, the plumbata mamillata, had a tapered point of circular section with a bulbous lead ballast below, mounted on a shaft up to 50 cm long and topped with fins at the opposite end. There was another type, the plumbata tribolata, which supposedly had spikes in the lead ballast to hurt soldiers who stepped on it, although no archaeological evidence of this variant has been found.
Use and Effectiveness
Each Roman soldier used to carry up to five of these projectiles on the inside of his shield, ready to be launched during a charge or in a defensive position. They were thrown with one hand and, according to experimental archeology research, they could reach up to 60 meters. This distance is twice the reach of the pilum or lancea. Vegecio compared the soldiers who threw the plumbata with archers, since they could wound the enemy before he entered the range of action of conventional projectiles.
The plumbata was a weapon of proven effectiveness against masses of infantry. Roman instructors placed great emphasis on training to increase the speed and strength of the throw. At the beginning of the battles, Roman troops unleashed a veritable "rain of projectiles" on the enemy, which was an effective response to the defensive tactics of the Germans, Persians and Sarmatians. This forced the enemy troops to reduce their speed and generated disorder in their ranks, allowing the legionaries to slow down the offensive or launch a counterattack. The plumbata gave the Roman legions a reach that doubled that of the pilum, because it was shorter and lighter, without preventing the Roman legionary from using his shield or quickly drawing his sword at the same time.
Pilum vs. Plumbata: A Battle of Adaptation
The evolution of the pilum to the plumbata was not a sign of decadence, but of a constant adaptation to the new military scenarios and the new enemies that Rome faced. The pilum was ideal for frontal clashes against large masses of infantry. However, it was less effective against the armored cavalry of the Persians and Goths. The lancet tried to cover this need, but its range was still insufficient against the fearsome horse archers who populated the eastern borders of Rome from the 3rd century AD. It was then that the plumbata became necessary, giving the Roman infantry unprecedented reach without impeding the use of the scutum (shield) or the rapid draw of the sword.
| Feature | Pilum | Plumbata |
|---|---|---|
| Penetration Power | Superior, capable of piercing shields and mortally wounding. | Good, able to penetrate shields and cause severe wounds, especially if the enemy was not armored. |
| Reach | Reduced, approximately 30 meters. | Major, up to 60 meters. |
| Quantity | 1 or 2 per legionary. | Up to 5 or 6 per legionary, which allowed for a greater number of initial projectiles. |
| Main Use | Shock weapon before close combat against infantry. | Offensive and defensive weapon, which allowed heavy infantry to combine roles with marksmen. Effective against cavalry. |
| Unusable | Its pyramidal tip made it difficult to remove from the shield, or it could bend. | There is no mention of bending, but its lead ballast and design contributed to its effectiveness. |
| Cost | High, due to its manufacturing. | Not detailed, but its small size and serial design could suggest a lower cost. |
| Evolution | Standard weapon from the Republic to the 2nd century AD | It emerged in the 3rd-4th centuries AD, prevailing over the pilum. |
Although the pilum was a superior weapon in terms of penetrating power and ability to disable shields, the plumbata became the primary throwing weapon because it allowed for a greater number of projectiles and a longer effective range. This change reflects a tactical adaptation: from a more offensive approach to a more reactive and defensive one, against new types of enemies.
Beyond Weapons: Roman Adaptability
The study of Roman weaponry, from the pilum to the plumbata, shows us that the Roman army of the Lower Empire did not decline in quality. Although the weapons maintained a certain continuity, the Roman panoply remained in a continuous process of adaptation to new military scenarios and the challenges imposed by new adversaries. This was not a weakening, but rather a tactical evolution to maintain its effectiveness.
In short, Roman throwing weapons are a testament to the constant innovation and adaptability of the most formidable army of Antiquity. Each weapon, in its own way, was a key piece in Rome's relentless pursuit of victory on the battlefield. If you are passionate about the military history of Rome and its incredible arsenal, you cannot miss exploring the historical replicas of these weapons that marked an era.
