Can A Crossbow Pierce Plate Armor?

by | Mar 27, 2024

When we think of medieval battles, we often envision knights clad in impenetrable plate armor, but can a crossbow pierce through this formidable defense? The image of arrows effortlessly penetrating plate armor is a common one in popular culture, but is it accurate?

Key Takeaways:

  • Plate armor was not as vulnerable as often portrayed in popular culture.
  • Armor effectiveness depended on the type of defense and the type of attack.
  • Textile defense, such as a gambeson, provided limited protection against piercing attacks.
  • Mail armor offered resistance against cutting attacks but was less effective against piercing attacks.
  • Plate armor provided advanced protection but had weaknesses in vulnerable areas.

Can A Crossbow Pierce Plate Armor?

Yes, a medieval crossbow could pierce plate armor, particularly when using specialized bolts and at close to medium ranges.

The effectiveness of a crossbow in penetrating plate armor depended on several factors, including the draw weight of the bow, the quality of the armor, the distance to the target, and the type of bodkin, or bolt head used. 

The entry angle played a big role in arrow penetration of steel breastplates. If crossbowmen hit straight on, their bolts could pierce mail, plate, and even the padded jack underneath.

Heavy crossbows, like arbalests, had draw weights over 1000 pounds. This gave their bolts high kinetic energy and penetration power.

Armor-piercing crossbows led to thicker, better-tempered plate armor in crucial areas.

Can a crossbow pierce plate armor

However, the effectiveness of a crossbow against plate armor was not absolute. Armorers adapted by improving the quality of armor, making it more capable of withstanding projectile impacts.

The ongoing arms race between weapon potency and armor protection was a hallmark of medieval warfare.

While crossbows could pierce armor at close range, the late medieval introduction of fully articulated plate armor improved protection against bolts.

This reduced crossbow effectiveness and spurred the development of more powerful firearms.

The Crossbow – A Medieval Marvel

Medieval crossbows were powerful and influential weapons on the battlefield, offering several advantages that made them formidable tools of war:

Crossbow Pros:

  1. High Power: Medieval crossbows could deliver significant force, capable of penetrating armor at close to medium ranges. This power came from the mechanical advantage provided by the crossbow design, which allowed the weapon to store more energy than a traditional bow.
  2. Armor Penetration: The ability to pierce armor, including chain mail and, in some cases, plate armor, made crossbows especially valuable in combating heavily armored knights. The strength of the crossbow bolt’s impact was due to both the kinetic energy it carried and the pointed design of the bolt head.
  3. Ease of Use: Crossbows required less physical strength and training to use effectively compared to the longbow. This meant that soldiers could be trained more quickly to a competent level of proficiency, broadening the pool of effective archers in an army.
  4. Versatility: Crossbows were useful in a variety of combat situations, including sieges, defensive positions, and open field battles. Their ability to be pre-loaded and held in a ready-to-fire state for some time without causing fatigue to the user made them ideal for ambushes and defensive stands.
  5. Psychological Impact: The power and effectiveness of the crossbow, combined with its ability to injure or kill from a distance, had a significant psychological impact on enemy troops. The fear of facing such a weapon could affect morale.

Crossbow Cons:

  • Slow Reload Time: The main disadvantage of the medieval crossbow was its slow rate of fire. Reloading a crossbow was a time-consuming process compared to drawing a traditional bow.
  • Weight and Bulk: Crossbows were generally heavier and bulkier than bows. This made them less convenient to carry and maneuver in some combat situations.

Despite these drawbacks, the crossbow’s power, ease of use, and versatility made it a critical weapon in medieval warfare, capable of changing the dynamics of battle and influencing military tactics for centuries. 

How Medieval Plate Armor Was Made

Medieval plate armor, which came into widespread use during the late Middle Ages, was a significant advancement in personal protection for knights and soldiers.

Forged in Fire:

  1. Materials: Plate armor was typically made from iron or steel. Early versions were made from wrought iron, while later, more advanced armor used steel plate for its superior strength and durability.
  2. Forging and Shaping: Blacksmiths and armorers used forging and heat treatment techniques to shape the metal into individual plates. These plates were then carefully formed to fit the parts of the body they were meant to protect. The process included heating the metal in a forge and then hammering it into shape on an anvil.
  3. Quenching and Tempering: To increase the strength and flexibility of the armor, the metal was often quenched (rapidly cooled) and tempered (reheated to a specific temperature). This process helped prevent the armor from being too brittle and prone to cracking.
  4. Polishing: The armor was polished to a high sheen, not only for aesthetic reasons but also to reduce rusting. A well-polished surface was less likely to corrode, extending the armor’s lifespan.
  5. Articulation: Plate armor was designed to be as articulated as possible, allowing for a good range of movement. This was achieved by joining individual plates at the joints with rivets or leather straps, creating a balance between protection and mobility.
  6. Decoration: High-status individuals often had armor that was not only functional but also highly decorative. Techniques such as etching, engraving, and the application of gold or silver inlays were used to create intricate designs, signifying wealth and rank.
  7. Fitting: Custom fitting was essential for effective plate armor. Armorers took measurements of the wearer to ensure that each piece of the armor would allow for the necessary mobility while providing maximum protection.

The Role of Textile Defense in Armor

When it comes to medieval armor, the base layer plays a crucial role in protecting warriors. This layer is known as textile defense, and one of its most common forms is the gambeson.

Made of multiple layers of thick fabric like linen or wool, the gambeson acts as a barrier that attackers must overcome before reaching the body.

The gambeson’s effectiveness lies in its construction. By quilting the fabric, tiny air pockets are created, forming a cushion against blunt force trauma.

Not only does this distribution of pressure absorb impact, but it also mitigates the risk of injury. The energy needed to pierce a gambeson by at least 40mm is measured in joules. This shows how protective it can be.

Blade attacks from swords or axes might not always get through a gambeson. But piercing attacks are a bigger threat.

Spears or arrows, aiming for armor’s weak spots, work better against this textile defense. Understanding gambesons shows how medieval warriors layered protection. Textiles, mail, and plate armor formed their complete defense system.

The Role of Mail Armor in Defense

Mail armor, also called chainmail or ringmail, features interlocking metal rings in a 4-in-1 pattern. It effectively protects against cuts and slashes. Yet, it is less effective against piercing or penetrating attacks.

The effectiveness of mail armor in defending against arrows and crossbow bolts varied depending on the thickness and quality of the rings used.

While mail armor could resist some arrows and bolts, it was not impervious to direct hits from powerful longbows or crossbows. In such cases, the sheer force and armor-piercing capabilities could cause the projectiles to penetrate through the rings.

Despite its limitations, mail armor played a crucial role in medieval warfare and provided a level of protection against a range of attacks.

Its flexibility allowed for ease of movement, making it a popular choice among warriors of the time. To give you a better understanding, here’s a quick breakdown of the effectiveness of mail armor:

The Effectiveness of Mail Armor Against Arrows

  • Resistant to some arrows, offering partial protection against glancing blows.
  • Less effective against powerful longbow shots or crossbow bolts, especially when they hit directly.

The Effectiveness of Mail Armor Against Crossbow Bolts

  • Capable of resisting weaker crossbow bolts, particularly if they hit at an angle or strike the rings non-directly.
  • Direct hits from powerful crossbow bolts may still penetrate through the rings, depending on the force and armor-piercing capabilities of the bolt.

To overcome these limitations, warriors and armorers explored other options, leading to the development of surface rigid defenses like plate armor, which we will delve into in the next section.

The Drw Weight of A Medieval Crossbow

Medieval crossbows had a wide range of draw weights, depending on their design, purpose, and the time. The draw weight of a medieval crossbow could vary significantly, from around 150 pounds (68 kg) for lighter models to well over 1,000 pounds (450 kg) for heavy siege crossbows.

The most common military crossbows used in battles and sieges would typically have draw weights in the range of 300 to 500 pounds (136 to 227 kg).

However, the most powerful crossbows, designed for penetrating armor at close ranges, could have draw weights exceeding 1,000 pounds.

These heavy draw weights required mechanical aids for cocking, such as windlasses, cranks, and lever systems, as they were beyond the strength of most users to span by hand.

The Limitations of Plate Armor

While plate armor, including surface rigid defenses like plates, coats of plates, and brigandines, provided advanced protection against various types of attacks, it was not invulnerable and had its limitations.

Properly made plate armor was highly resistant to direct hits from arrows, spears, or swords. However, vulnerable areas such as joints and gaps had less protection, making them potential weak points that skilled swordsmen could exploit.

By targeting these openings, they could thrust their weapons through and potentially bypass the armor’s defense.

Plate armor also faced challenges from more powerful firearms, which eventually led to its decline. The advancements in firearms made it increasingly difficult for plate armor to withstand the force and impact of bullets.

Overall, while plate armor provided significant protection against a range of attacks, it was not impervious to penetration, especially in vulnerable areas.

The limitations of plate armor highlight the constant evolution of warfare and the ongoing quest for improved defense technology.

Plate Armor LimitationsPlate Armor Advantages
Vulnerable areas in joints and gapsAdvanced protection against most types of attacks
Reduced protection in weak pointsResistance to direct hits from arrows, spears, and swords
Challenges from more powerful firearmsSignificant defense against a range of weapons

Crossbows vs Longbows

When it comes to medieval weaponry, longbows and medieval crossbows both had their own distinct advantages and disadvantages.

Let’s take a closer look at what made each weapon unique and how they fared in terms of effectiveness and armor penetration.


  • Greater rate of fire, firing range, and accuracy
  • Capable of penetrating early forms of plate armor with direct hits
  • Penetration capability decreased against more advanced plate armor


  • Slower rate of fire compared to longbows
  • More powerful due to their mechanical advantage
  • A crossbow with a higher draw weight could pierce plate armor with greater force than a longbow

However, it is worth noting that both longbows and crossbows had their limitations when it came to penetrating the thickest and best-made plate armor.

Despite their power and accuracy, even the most skilled archer or crossbowman would find it challenging to successfully pierce through such formidable defense.

To further illustrate the comparison between longbows and crossbows, the table below provides a concise overview:

Read More: Can A Longbow Pierce Plate Armor?

Rate of FireHigherSlower
Firing RangeGreaterVaries
Armor PenetrationPossible against early plate armor, but effectiveness decreases against advanced plate armorGreater capability to pierce plate armor with higher draw weight

Longbows and crossbows were key in medieval warfare, each bringing unique strengths to battle. Their success against plate armor depended on the armor’s thickness, quality, and design.

Though both could pierce armor to some degree, the thickest, highest-quality plate offered strong protection against their shots.

Armor Quality and Design

The quality and design of plate armor played a significant role in its effectiveness against sword thrusts. Well-crafted armor made by skilled armorers would be harder to penetrate compared to poorly made armor. T

hickness, hardening techniques, and overlapping plates were factors that could enhance the armor’s resistance to sword attacks.

However, even the finest plate armor had weak points and gaps that could be exploited with careful maneuvering and precise strikes.

Armor Vulnerabilities and Countermeasures

Armor, including plate armor, has vulnerabilities that require countermeasures for enhanced protection. One such countermeasure is the use of shields, which play a crucial role in defending against attacks that could bypass armor, such as arrows and other projectiles.

Shields are effective in deflecting or blocking incoming missiles, providing an additional layer of defense.

To further improve armor protection, advancements have been made in armor design and materials. One approach is the use of overlapping plates, which provide additional reinforcement and reduce the chances of penetration.

Strengthening joints and gaps in the armor is another important aspect, as these areas are typically more vulnerable. By enhancing these weak points, armor becomes more resistant to attacks.

Another strategy is the addition of reinforcing elements, which enhance the overall strength and durability of the armor.

These elements can be in the form of metal reinforcements or extra layers of fabric or padding. By incorporating such improvements, armor manufacturers have been able to reduce vulnerabilities and enhance the protective capabilities of armor.

Armor improvements

Armor improvements have been crucial in addressing vulnerabilities and enhancing protective capabilities. Advancements in armor technology have focused on strengthening weak points and increasing resistance to penetration.

Some key armor improvements include:

  1. Reinforced joints: By reinforcing joints with additional protective elements like overlapping plates or metal reinforcements, armor becomes less susceptible to penetration at these critical points.
  2. Enhanced gaps: Armor improvements include the incorporation of overlapping or reinforced materials in gaps, reducing the risk of penetration through these vulnerable areas.
  3. Advanced materials: The use of advanced materials, such as high-strength alloys or laminated composites, enhances the overall strength and resilience of armor, making it more resistant to attacks.
  4. Technological innovations: With advancements in technology, armor manufacturers have been able to integrate additional protective features, such as shock-absorbing layers or energy-dispersing elements, to minimize the impact of attacks and prevent penetration.

These armor improvements have significantly increased the protective capabilities of armor, making it more effective at withstanding various types of attacks.

Armor VulnerabilitiesCountermeasures
Vulnerable joints and gapsReinforce joints with overlapping plates or metal reinforcements
Weakened spots in the armor surfaceEnhance weak points with additional layers of protection
Penetrable by arrows and projectilesUse shields to intercept and deflect missiles
Reduced resistance against piercing attacksIntegrate advanced materials for increased strength and durability

The Evolution of Armor Technology

Throughout history, armor technology has undergone significant advancements and improvements to adapt to the ever-changing challenges on the battlefield.

Armor evolved from simple textile defenses like gambesons to advanced plate armor, improving protection against attacks.

A key advancement was in metallurgy, leading to stronger, more durable plate armor.

Better steel and alloys made armor more resistant to strikes, lowering penetration risk and enhancing protection.

Evolution of armor plate

Design modifications also played a crucial role in improving armor effectiveness. Vulnerabilities in weak points, such as joints and gaps, were identified and addressed through adjustments in armor construction.

Reinforcements, such as additional plates or overlapping layers, were implemented to minimize the risk of penetration in these areas, further enhancing the armor’s resistance.

Guns’ power and accuracy made the best plate armor less effective, causing heavy armor to fade from battlefields.

Though armor became obsolete against new weapons, its development highlights human creativity and the ongoing search for better combat protection.

Armor advancements throughout the centuries have significantly contributed to the safety and survival of warriors in various eras.

Armor Technology Timeline

Time PeriodArmor Advancements
Medieval TimesIntroduction of textile defenses like gambesons Early forms of mail armor
RenaissanceEmergence of plate armor Refinements in the shape and coverage of plate components Improved metallurgy for stronger plates
Modern EraDevelopment of bullet-resistant armor Introduction of lightweight materials like Kevlar Advancements in ceramic and polymer armors

As technology continues to progress, modern armor designs have taken advantage of new materials and manufacturing techniques to create lighter and more effective protection for military and law enforcement personnel.


Can a crossbow pierce plate armor?

Plate armor provided significant protection against crossbow bolts. While direct hits from crossbow bolts could penetrate weaker points or thinner sections of plate armor, a well-made plate armor would be highly resistant to crossbow penetration.

What is the role of textile defense in armor?

Textile defense, such as a gambeson, protected by requiring any piercing or cutting attack to defeat multiple layers of textile before reaching the body. However, textile defense provided little protection against piercing or penetrating attacks like arrows or crossbow bolts.

How effective is mail armor in defense?

Mail armor, with its interlocking metal rings, protected against cuts and slashes but struggled with piercing attacks. It could block some arrows and bolts, yet direct shots from strong longbows or crossbows might pierce the rings.

What are the limitations of plate armor?

Plate armor was the most advanced defense in medieval times, but it had its vulnerabilities. While direct hits from arrows, spears, or swords were unlikely to penetrate properly made plate armor, vulnerable areas like joints and gaps had less protection.

How do longbows and crossbows compare in effectiveness?

Longbows had a greater rate of fire, firing range, and accuracy. They could penetrate early forms of plate armor with direct hits, but their penetration capability decreased against more advanced plate armor. Crossbows, on the other hand, had a slower rate of fire but were more powerful due to their mechanical advantage. However, both longbows and crossbows had limitations in penetrating the thickest and best-made plate armor.

How were armor vulnerabilities addressed?

Shields played a crucial role in protecting combatants against arrows and other missile fire that could bypass armor. Advancements were also made in armor design and materials, such as using overlapping plates, strengthening joints and gaps, and adding reinforcing elements to reduce vulnerabilities in weak points.

How did armor technology evolve over time?

Armor technology adapted to the changing challenges and threats on the battlefield. From basic textile defenses like gambesons to advanced plate armor, armor design and materials improved to provide better protection. Advancements in metallurgy allowed for stronger and more durable plate armor, while design modifications addressed vulnerabilities in weak points.

What was the effectiveness of crossbows against plate armor?

While crossbows had some armor-piercing capabilities, plate armor provided significant protection against crossbow bolts. Direct hits from crossbow bolts could penetrate weaker points or thinner sections of plate armor, but a well-made plate armor would be highly resistant to crossbow penetration.


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