The Evolution of Indirect Fire Against Armored Spearheads
People don't think about this enough, but artillery was never explicitly designed to hunt tanks. Go back to the Cold War doctrines of the 1970s and 1980s, where Soviet deep battle doctrine anticipated waves of T-64s and T-72s charging across the Fulda Gap. NATO’s response wasn't to try and hit each individual metal monster with a conventional high-explosive shell. Instead, the goal of the green-painted M109 howitzers was to suppress the buttoned-up crews, shred their external optics, and separate the accompanying infantry from their armored transports. It was about creating chaos, not necessarily punching holes through a glacis plate.
From World War Churn to Precision Drone Spotting
Then everything changed. If you look at the recent high-intensity attritional warfare in Europe, specifically during the defense of Kyiv and the grinding artillery duels in the Donbas throughout 2022 and 2024, the classic concept of a "barrage" has mutated. The thing is, before real-time quadcopter surveillance, hitting a moving target with indirect fire required firing hundreds of unguided projectiles to secure a single statistical hit. Today, a single 155mm artillery round can be walked directly onto a stationary vehicle because a drone operator three kilometers away is adjusting the fire coordinates in real-time via encrypted digital tablets.
The Physics of Destruction: Kinetic Energy Versus High Explosive Blast
Where it gets tricky is understanding what actually happens when a 155mm artillery shell—packing roughly 15 to 24 pounds of high-grade Composition B or TNT explosive inside a thick, forged steel casing weighing nearly 100 pounds—collides with a vehicle designed to survive anti-tank guided missiles. A standard M107 or high-explosive fragmentation projectile traveling at a terminal velocity of several hundred meters per second relies on sheer kinetic energy combined with overpressure. But we're far from the realm of dedicated anti-tank kinetic energy penetrators like depleted uranium darts fired from an M1A2 Abrams main gun.
The Brutal Mechanics of a Direct Top-Attack Hit
Let’s look at the numbers. The roof armor of even the most heavily protected modern combat vehicles—think a German Leopard 2A6 or a Russian T-90M—is notoriously thin, often measuring a meager 20mm to 40mm of conventional steel equivalent. When a 155mm projectile slams directly onto this horizontal surface, the armor simply fails. The detonation creates a massive spall cone inside the fighting compartment. And because the explosion occurs right above the crew's heads, it violently drives the roof plate downward, instantly detonating stored ammunition or obliterating the engine block underneath. I am convinced that no operational main battle tank today can survive a clean, direct top-attack impact from a heavy artillery round; the physical structural geometry of vehicle design makes it impossible to armor a tank equally on all sides without making it too heavy to cross a standard European bridge.
The Reality of Near Misses and Spalling Damage
Except that direct hits are still incredibly rare in the grand scheme of combat. What happens when the shell lands two meters away? This is where the shockwave takes over. The immense overpressure generated by 20,000 to 30,000 pounds per square inch of explosive force can instantly buckle the track links, shatter the drive sprockets, and tear off the rubber road wheels, rendering a sixty-ton vehicle completely immobile. A tracked vehicle that cannot move is, for all tactical purposes, dead. It becomes a sitting duck for subsequent strikes or infantry cleanup crews.
The Metallurgical Nightmare: Mission Kills and Shattered Optics
Even if the hull remains completely unbreached, a near miss from heavy artillery frequently achieves what military analysts term a mission kill. A modern western tank is only as good as its electronic eyes. The exterior of a contemporary armored vehicle is a delicate forest of thermal imaging cameras, laser rangefinders, meteorological sensors, and active protection radar arrays like the Israeli-designed Trophy system.
Shrapnel as a Universal Equalizer Against Advanced Sensors
When that high-explosive casing shatters into thousands of jagged, supersonic steel fragments, it completely strips the tank of its combat capability. The commander's panoramic sight is smashed. The gunner is left blind, forced to rely on backup optical ports that offer a fraction of the original field of view. Can you fight a tank if you can't see past your own mudguards? Yet, the crew remains completely uninjured inside their armored cocoon, creating a strange paradox where a pristine hull protects a militarily useless asset that must now retreat or be abandoned by its terrified occupants.
Internal Spalling Without Outer Armor Penetration
But the damage can also manifest internally without leaving a single hole in the steel. When the massive blast wave hits the thick front glacis plate, it sends a violent acoustic and physical shockwave rippling through the armor matrix. This phenomenon, known as Hopkinson pressure bar effect, causes the inner face of the armor plate to fracture and flake off. These internal razor-sharp fragments, or spall, ricochet wildly inside the cramped turret at supersonic speeds. It kills the crew and shreds the delicate hydraulic lines, meaning the tank looks perfectly fine from the outside while being a tomb on the inside.
Comparing 155mm Capabilities Against Dedicated Anti-Armor Weaponry
The issue remains that using conventional artillery to kill armor is fundamentally an inefficient use of resources when compared to dedicated tools. Consider the logistics. An infantry team equipped with a single FGM-148 Javelin missile can achieve a guaranteed top-attack kill at a range of 2,500 meters using a specialized tandem shaped-charge warhead. To achieve that exact same outcome with standard unguided 155mm M795 projectiles, an entire battery of six M777 howitzers might need to fire a coordinated grid saturation for three minutes, consuming dozens of shells.
The Logistic Weight of Fire Support Systems
Hence, the logistical footprint tells the true story of the battlefield. A single 155mm shell weighs around 95 to 100 pounds, not including the modular artillery charge system required to propel it out of the tube. To destroy a moving armored column using old-school massed fires requires tons of ammunition transported by heavy trucks that are highly vulnerable to counter-battery radar detection. That changes everything when you realize that a modern military must balance its logistical tail against the immediate tactical utility of its frontline weapons.
Common misconceptions about heavy shells and armor
The myth of the absolute kinetic shrug
You see it in forums and amateur tactical breakdowns constantly: the absurd notion that a main battle tank is an impenetrable fortress impervious to anything short of a dedicated anti-tank missile or a depleted uranium sabot dart. This is pure fantasy. When a massive high-explosive projectile detonates directly on a turret, it does not need to pierce the armor plate to neutralize the vehicle. Can 155mm artillery destroy a tank without a shaped charge? Absolutely. The problem is that people confuse a "kill" with a Hollywood-style catastrophic explosion where the turret flies into the stratosphere. A mobility kill or a mission kill is just as lethal on a modern, fast-moving battlefield. If a 95-pound shell packed with Composition B explodes against the front glacis, the internal spalling will shred the crew inside regardless of whether the outer shell breaches. Let's be clear: energy does not simply vanish because an armor plate is thick.
The "near-misses do nothing" fallacy
Another dangerous assumption relies on the idea that fragmentation only scratches the paint of heavy armor. Except that modern tanks are not just lumps of steel; they are delicate, highly complex sensor platforms. A detonation within ten meters is more than enough to shred the external optics, shatter the tracks, and snap the delicate antennas. What happens when a tank can no longer see? It becomes a blind, stationary multi-million-dollar bunker. Because of the incredible overpressure generated by these salvos, the shockwave alone can buckle external storage bins, destroy the auxiliary power unit, and violently concuss the crew through the hull. Artillery fire against armor relies heavily on this systemic degradation rather than a lucky, pinpoint strike.
The terrifying reality of top-attack precision and airburst geometry
Why roof armor is a structural joke
Tanks are built like heavy knights, armored heavily at the front but wearing nothing but a thin tunic on top. The roof armor of a standard T-72 or even an M1A2 Abrams rarely exceeds 40 millimeters of steel equivalent. This is where 155mm heavy artillery effectiveness transitions from a numbers game into an execution chamber. Precision-guided munitions, such as the Bonus or SMArt 155 projectiles, exploit this structural vulnerability with terrifying lethality. These carrier shells deploy submunitions that scan the ground using infrared and radar sensors, identifying targets before firing an explosively formed penetrator directly downward at velocities exceeding 2,000 meters per second. (Imagine a slug of molten copper traveling faster than a rifle bullet punching through steel like butter). You cannot survive that, no matter how advanced your active protection system claims to be.
The lethal calculus of DPICM saturation
But what if the artillery is unguided? The issue remains a matter of volume and probability. Dual-Purpose Improved Conventional Munitions rain down dozens of smaller shaped-charge bomblets over a wide area. Each submunition is capable of penetrating roughly 70 to 100 millimeters of conventional steel armor, making them a nightmare for the vulnerable engine decks and turret roofs of armored formations. Yet, a single submunition might only disable one component. Which explains why artillery doctrines emphasize massed battery fire to guarantee total saturation. As a result: an armored assault caught in the open during a heavy fragmentation barrage will rapidly dissolve into a burning graveyard of immobilized machinery.
Frequently Asked Questions
Can 155mm artillery destroy a tank via a direct hit?
Yes, a direct hit from a standard M107 or M795 155mm high-explosive projectile will completely destroy or permanently neutralize any modern main battle tank. The kinetic energy alone at terminal velocity is immense, but the real devastation comes from the 10.8 kilograms of TNT equivalent detonating instantly against the hull. This massive blast creates widespread internal spalling, destroying sensitive electronic fire-control systems, fracturing torsion bars, and killing or severely injuring the crew inside. Historical test data from Operation Desert Storm and subsequent live-fire evaluations confirm that no operational tank can withstand a direct impact from a heavy artillery shell and remain combat-effective. In short, it is a catastrophic event for the vehicle.
How close does a 155mm shell need to land to disable a tank?
A heavy artillery shell does not need to score a bullseye to eliminate an armored threat from the battlefield. A detonation within a 30-meter radius can reliably achieve a mobility kill by throwing the tracks or destroying the drive sprockets. Furthermore, if the projectile lands within 5 to 10 meters, the blast overpressure is sufficient to rupture fuel lines, shatter external sights, and cause severe concussive trauma to the crew inside the cabin. Are we supposed to believe a tank is useful if its crew is unconscious and its primary optics are pulverized? Consequently, even near-misses effectively remove heavy armor from active combat operations.
What is the difference between HE and precision anti-tank artillery rounds?
Standard high-explosive rounds rely on raw blast and fragmentation to damage armor through proximity or sheer luck, whereas specialized anti-tank munitions are designed specifically to hunt and kill heavy vehicles. Advanced options like the Excalibur utilize GPS guidance for pinpoint accuracy, while rounds like the 155mm Bonus submunition carry two independent sensor-fused warheads that target the tank from above. These specialized projectiles detect the thermal signature of an engine deck and fire a high-velocity slug directly into the weakest part of the vehicle. This methodology ensures a guaranteed kill with a fraction of the ammunition required by conventional unguided barrages.
Beyond the armor: The final verdict on battlefield reality
The romanticized duel between tank and anti-tank gun is dead, replaced by a brutal system of combined arms where heavy guns rule the field. Armor enthusiasts love to boast about composite matrices and active protection systems, but the cold math of logistics always wins. Heavy artillery impact on tanks is not a hypothetical debate; it is an omnipresent meat grinder. We must stop viewing the tank as an isolated champion and recognize it as a vulnerable component in a hostile ecosystem. The reality is simple: a sustained artillery barrage will always break an armored thrust, if not through spectacular hull breaches, then through the slow, agonizing destruction of its tracks, optics, and human operators. Artillery remains the king of battle, and even the heaviest armor must bow before its crown.