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A tank destroyer, tank hunter or tank killer is a type of
armoured fighting vehicle An armoured fighting vehicle (British English) or armored fighting vehicle (American English) (AFV) is an armed combat vehicle protected by vehicle armour, armour, generally combining operational mobility with Offensive (military), offensive a ...
, predominantly intended for
anti-tank Anti-tank warfare refers to the military strategies, tactics, and weapon systems designed to counter and destroy enemy armored vehicles, particularly tanks. It originated during World War I following the first deployment of tanks in 1916, and ...
duties. They are typically armed with a
direct fire Direct fire or line-of-sight fire refers to firing of a ranged weapon whose projectile is launched directly at a target within the line-of-sight of the user. The firing weapon must have a sighting device and an unobstructed view to the target, ...
artillery gun, also known as a self-propelled anti-tank gun, or missile launcher, also called an anti-tank missile carrier. The vehicles are designed specifically to engage and destroy enemy
tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; ...
s, often with limited operational capacities. While tanks are designed for front-line combat, combining
operational mobility In the field of military theory, the operational level of war (also called operational art, as derived from , or operational warfare) represents the level of command that connects the details of tactics with the goals of strategy. In U.S. ...
and tactical offensive and defensive capabilities and performing all primary tasks of the armoured troops, the tank destroyer is specifically designed to take on enemy tanks and other armoured fighting vehicles. Many are based on a tracked tank
chassis A chassis (, ; plural ''chassis'' from French châssis ) is the load-bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart ...
, while others are wheeled. Since
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, gun-armed powerful tank destroyers have fallen out of favor as armies have favored multirole
main battle tank A main battle tank (MBT), also known as a battle tank or universal tank or simply tank,Ogorkiewicz 2018 p222 is a tank that fills the role of armour-protected direct fire and maneuver in many modern armies. Cold War-era development of more po ...
s. However, lightly armoured
anti-tank guided missile An anti-tank guided missile (ATGM), anti-tank missile, anti-tank guided weapon (ATGW) or anti-armor guided weapon is a guided missile primarily designed to hit and destroy heavily armored military vehicles. ATGMs range in size from shoulde ...
(ATGM) carriers are commonly used for supplementary long-range anti-tank work. The resurgence of
expeditionary warfare Expeditionary warfare is a military invasion of a foreign territory, especially away from established bases. Expeditionary forces were in part the antecedent of the modern concept of rapid deployment forces. Traditionally, expeditionary forces we ...
in the first two decades of the 21st century has seen the emergence of gun-armed wheeled vehicles, sometimes called "protected gun systems", which may bear a superficial resemblance to tank destroyers, but are employed as direct fire support units typically providing support in low-intensity operations, as was done in wars in
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
and
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...
.


World War II

Dedicated anti-tank vehicles made their first major appearance in the Second World War as combatants developed effective armoured vehicles and tactics. Some were little more than stopgap solutions, mounting an
anti-tank gun An anti-tank gun is a form of artillery designed to destroy tanks and other armoured fighting vehicles, normally from a static defensive position. The development of specialized anti-tank munitions and anti-tank guns was prompted by the appearance ...
on a tracked vehicle to give mobility, while others were more sophisticated designs. An example of the development of tank destroyer technology throughout the war is the Marder III and Jagdpanzer 38 vehicles, which were very different in spite of being based on the same chassis: Marder was straightforwardly an anti-tank gun on tracks, whereas the Jagdpanzer 38 traded some firepower (its 7.5 cm Pak 39, designed to operate within the confines of a fully armoured fighting compartment, fires the same projectiles from a reduced propellant charge compared to Marder's 7.5 cm Pak 40) for better armour protection and ease of concealment on the battlefield. Except for most American designs, all tank destroyers were turretless vehicles with fixed or
casemate A casemate is a fortified gun emplacement or armoured structure from which guns are fired, in a fortification, warship, or armoured fighting vehicle.Webster's New Collegiate Dictionary When referring to antiquity, the term "casemate wall" ...
superstructures. When a tank destroyer was used against enemy tanks from a defensive position such as by ambush, the lack of a rotating
turret Turret may refer to: * Turret (architecture), a small tower that projects above the wall of a building * Gun turret, a mechanism of a projectile-firing weapon * Optical microscope#Objective turret (revolver or revolving nose piece), Objective turre ...
was not particularly critical, while the lower silhouette was highly desirable. The turretless design allowed accommodation of a more powerful gun, typically a dedicated anti-tank gun (in lieu of a regular tank's general-purpose main gun that fired both anti-tank and high explosive ammunition) that had a longer barrel than could be mounted in a turreted tank on the same chassis. The lack of a turret increased the vehicle's internal volume, allowing for increased ammunition stowage and crew comfort. Eliminating the turret let the vehicle carry thicker armour, and also let this armour be concentrated in the hull. Sometimes there was no armoured roof (only a weather cover) to keep the overall weight down to the limit that the chassis could bear. The absence of a turret meant that tank destroyers could be manufactured significantly cheaper, faster, and more easily than the tanks on which they were based, and they found particular favor when production resources were lacking.


Germany

The first
German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...
tank destroyers were the ''
Panzerjäger ''Panzerjäger'' (German: literally "armor hunter", more broadly "anti-tank") is a term used for an anti-tank vehicle (self-propelled anti-tank gun), as well as anti-tank units. The term was first used in the Wehrmacht (German armed forces, 19 ...
'' ("Tank Hunters"), which mounted an existing anti-tank gun on a convenient chassis for mobility, usually with just a three-sided
gun shield A U.S. Marine manning an M240 machine gun equipped with a gun shield A gun shield is a flat (or sometimes curved) piece of armor designed to be mounted on a crew-served weapon such as a machine gun, automatic grenade launcher, or artillery pie ...
for crew protection. For instance, 202 obsolete
Panzer I The Panzer I was a light tank produced by Nazi Germany in the 1930s. Its name is short for ( German for " armored fighting vehicle mark I"), abbreviated as . The tank's official German ordnance inventory designation was '' Sd.Kfz. 101 ...
light tanks were modified by removing the turret and were rebuilt as the Panzerjäger I self-propelled 4.7 cm PaK(t). Similarly,
Panzer II The Panzer II is the common name used for a family of Nazi Germany, German tanks used in World War II. The official German designation was ''Panzerkampfwagen'' II (abbreviated ''Pz.Kpfw. II''). Although the vehicle had originally been designed a ...
tanks were used on the eastern front. Captured Soviet anti-tank guns were mounted on modified Panzer II chassis, producing the Marder II self-propelled anti-tank gun. The most common mounting was a German anti-tank gun on the Czech
Panzer 38(t) The 38(t), originally known as the ČKD, Českomoravská Kolben-Daněk (ČKD) LT vz. 38, was a tank designed during the 1930s, which saw extensive service during World War II. Developed in Czechoslovakia by ČKD, the type was adopted by Nazi G ...
chassis as the Marder III. The Panzer 38(t) chassis was also used to make the Jagdpanzer 38 casemate style tank destroyer. The Panzerjäger series continued up to the equipped Nashorn. German tank destroyers based on the
Panzer III The ''Panzerkampfwagen III (Pz.Kpfw. III)'', commonly known as the Panzer III, was a medium tank developed in the 1930s by Nazi Germany, Germany, and was used extensively in World War II. The official German ordnance designation was List of Sd.K ...
medium tank and later German tanks had more armour than their tank counterparts. One of the more successful German tank destroyers was designed as a self-propelled artillery gun, the ''
Sturmgeschütz III The ''Sturmgeschütz'' III (StuG III) was an assault gun produced by Nazi Germany during World War II. It was the most-produced German Continuous track, fully tracked armoured fighting vehicle, and second-most produced German armored combat ve ...
''. Based on the Panzer III tank chassis, the ''Sturmgeschütz III'' was originally fitted with a short barreled low-velocity howitzer-like gun, and was assigned to the artillery arm for infantry fire support as an
assault gun An assault gun (from , , meaning "assault gun") is a type of armored infantry support vehicle and self-propelled artillery, mounting an infantry support gun on a protected self-propelled chassis, intended for providing infantry with heavy di ...
. Later, after encountering Soviet tanks, it was refitted with a comparatively short-barreled high-velocity anti-tank gun, usually with a
muzzle brake A muzzle brake or recoil compensator is a device connected to, or a feature integral (ported barrel) to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter re ...
, enabling it to function as a tank destroyer. The ''Sturmgeschütz III'' from its 1938 origin used a new casemate-style superstructure with an integrated design, similar to the later '' Jagdpanzer'' vehicle designs' superstructure, to completely enclose the crew. It was employed in infantry support and offensive armoured operations as well as in the defensive anti-tank role. The StuG III assault gun was Germany's most-produced fully tracked armoured fighting vehicle during World War II, and second-most produced German armoured combat vehicle of any type after the Sd.Kfz. 251
half-track A half-track is a civilian or military vehicle with wheels at the front for steering and continuous tracks at the back to propel the vehicle and carry most of the load. A half-track combines the soft-ground traction of a tank with the Car handl ...
. Although the early German ''Panzerjäger'' carried more effective weapons than the tanks on which they were based, they were generally lacking in protection for the crew, having thinly armoured open-topped superstructures. The "open-topped" design format of the ''Panzerjäger'' vehicles was succeeded by the '' Jagdpanzer'' ("hunting tanks"), which mounted the gun in true casemate-style superstructures, completely enclosing the crew compartment in armor that was usually integral to the hull. The first of these ''Jagdpanzer''s was the 70-ton ''Ferdinand'' (later renamed ''
Elefant Elefant ( German for "elephant") was a heavy tank destroyer (self propelled anti-tank gun) used by German ''Panzerjäger'' (anti-tank units) during World War II. Ninety-one units were built in 1943 under the name Ferdinand (after its designer F ...
''), based on the chassis, hulls, and drive systems of ninety-one Porsche VK4501 (P) heavy tanks, mounting a long-barreled 88 mm cannon in an added casemate, more like the earlier ''Panzerjägers'' had with their added-on armour shielding for the gun crew, but in the ''Ferdinand'' completely enclosing the gun and firing crew in the added casemate, as the later purpose-built ''Jagdpanzers'' would. However, the ''Ferdinand'' was mechanically unreliable and difficult to maneuver, and once all ninety-one unturreted "Porsche Tiger" hulls/drive systems were converted, no more were built. The German Army had more success with the Jagdpanther. Introduced in mid-1944, the Jagdpanther, of which some 415 examples were produced, was considered the best of the casemate-design Jagdpanzer designs.Forty and Livesey 2006 p. 33 It featured the same powerful PaK 43 88 mm cannon used on the unwieldy ''Elefant'', now fitted to the chassis of the medium
Panther tank The Panther tank, officially ''Panzerkampfwagen V Panther'' (abbreviated Pz.Kpfw. V) with Sonderkraftfahrzeug, ordnance inventory designation: ''Sd.Kfz.'' 171, is a German medium tank of World War II. It was used in most European theatre of ...
, providing greatly improved armour-penetrating capability in a medium-weight vehicle. Facing an increasingly defensive war, the German Army turned to larger and more powerfully armed Jagdpanzer designs, and in July 1944 the first '' Jagdtiger'' rolled off the production line; it was the heaviest German armoured fighting vehicle to go into active service. The ''Jagdtiger'' was based on the
Tiger II The Tiger II was a Nazi Germany, German heavy tank of the World War II, Second World War. The final official German designation was ''Panzerkampfwagen'' Tiger ''Ausf''. B, often shortened to Tiger B.Jentz and Doyle 1993, p. 16. The ordnance inve ...
heavy tank featured a very large 128 mm PaK 44 cannon and heavy armour protection. Only 88 ''Jagdtiger'' vehicles were produced, barely matching the total number of the earlier Ferdinand / Elefant vehicles. They were first deployed to combat units in September 1944. The decision of German armoured vehicle designers to use a casemate-style superstructure for all tank destroyers had the advantage of a reduced silhouette, allowing the crew to more frequently fire from defilade ambush positions. Such designs were also easier and faster to manufacture and offered good crew protection from artillery fire and shell splinters. However, the lack of a rotating turret limited the gun's traverse to a few degrees. This meant that the driver normally had to turn the entire tank onto its target, a much slower process than simply rotating a powered turret. If the vehicle became immobilized due to engine failure or track damage, it could not rotate its gun to counter opposing tanks, making it highly vulnerable to counterfire. This vulnerability was later exploited by opposing tank forces. Even the largest and most powerful of German tank destroyers were found abandoned on the field after a battle, having been immobilized by one or more hits by high explosive (HE) or armour-piercing (AP) shells to the track or front drive sprocket.


Italy

The most famous Italian tank destroyer of the Second World War was a self-propelled gun. The Semovente da 75/18, based on the M13/40 frame, was developed to support front-line infantry, and therefore had fixed armament: a 75 mm gun in casemate. However, thanks to its low height (185 cm) and the caliber of its gun the 75/18 also had good results in anti-tank combat, fighting against British and American (but not Soviet) units. After the Armistice of 1943, the 75/18 remained in use by German forces. Built on the same frame, the Semovente da 105/25 was equipped with a 105 mm gun and known as "''bassotto''" (Italian for
dachshund The dachshund ( or ; German: 'badger dog'), also known as the wiener dog or sausage dog, badger dog, doxen and doxie, is a short-legged, long-bodied, hound-type dog breed. The dog may be smooth-haired, wire-haired, or long-haired, with varie ...
) due to its lower height. As manufacturing began in 1943, the 105/25 was used by German forces. A further development was the Semovente da 75/46, which had a longer gun than the 75/18 and inclined armour 100 mm thick, making it similar to ''Sturmgeschütz'' III. Only 11 of these were manufactured. Before the Semovente da 75/18, the L40, built on an L6/40 light tank chassis, saw action in Africa and in Russia, but with disappointing results.


Japan

The Type 1 Ho-Ni I was the first self-propelled gun design of the
Imperial Japanese Army The Imperial Japanese Army (IJA; , ''Dai-Nippon Teikoku Rikugun'', "Army of the Greater Japanese Empire") was the principal ground force of the Empire of Japan from 1871 to 1945. It played a central role in Japan’s rapid modernization during th ...
. They were meant to be
self-propelled artillery Self-propelled artillery (also called locomotive artillery) is artillery equipped with its own propulsion system to move toward its firing position. Within the terminology are the self-propelled gun, self-propelled howitzer, self-propelled mo ...
and tank destroyers for armoured divisions. The plan was for the Type 1 Ho-Ni I gun tank to form part of a fire support company in each of the tank regiments. The Type 1 Ho-Ni I was developed by using the existing Type 97 Chi-Ha medium tank chassis and engine, and replacing the
gun turret A gun turret (or simply turret) is a mounting platform from which weapons can be fired that affords protection, visibility and ability to turn and aim. A modern gun turret is generally a rotatable weapon mount that houses the crew or mechanis ...
with a Type 90 75 mm field gun mounted in an open
casemate A casemate is a fortified gun emplacement or armoured structure from which guns are fired, in a fortification, warship, or armoured fighting vehicle.Webster's New Collegiate Dictionary When referring to antiquity, the term "casemate wall" ...
with frontal and side armour only. They entered service in 1942 and were first deployed in combat at the
Battle of Luzon The Battle of Luzon (; ; ) was a land battle of the Pacific Theater of Operations of World War II by the Allied forces of the U.S., its colony the Philippines, Mexico, and allies against forces of the Empire of Japan. The battle resulted in a U ...
in the
Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...
in 1945. Some were used in static entrenched positions. A variant, known as the Type 1 Ho-Ni II mounted a Type 91 105 mm howitzer and had a slightly changed superstructure as far as the side armor with re-positioned observation visors. Production began in 1943, with only 54 completed. The other variant produced was the Type 3 Ho-Ni III, which mounted a Type 3 75 mm tank gun in a completely enclosed armored casemate to address the issue of crew protection in close combat. The welded superstructure had sloped armour and the gun mount had additional stamped armour plate. The total number produced of all three types in the Ho-Ni series were 111 units. Most of the Ho-Ni units were retained within the
Japanese home islands The is an archipelago of 14,125 islands that form the country of Japan. It extends over from the Sea of Okhotsk in the northeast to the East China and Philippine seas in the southwest along the Pacific coast of the Eurasian continent, and cons ...
to form part of the defenses against the projected American invasion, and did not see combat before the
surrender of Japan The surrender of the Empire of Japan in World War II was Hirohito surrender broadcast, announced by Emperor Hirohito on 15 August and formally Japanese Instrument of Surrender, signed on 2 September 1945, End of World War II in Asia, ending ...
. The Type 2 Ho-I Gun tank used the Type 1 Chi-He medium tank chassis. It was designed as a
self-propelled howitzer Self-propelled artillery (also called locomotive artillery) is artillery equipped with its own propulsion system to move toward its firing position. Within the terminology are the self-propelled gun, self-propelled howitzer, self-propelled mo ...
, mounting a short barreled Type 99 75 mm gun to provide close-in fire support. For deployment, the gun tank was intended to be used in a fire support company for each of the tank regiments. No Type 2 Ho-I gun tanks are known to have engaged in combat prior to Japan's surrender. The prototype was built in 1942 and 31 units were produced in 1944. The Type 4 Ho-Ro self-propelled artillery used a modified Type 97 chassis. On to this platform, a Type 38 150 mm howitzer was mounted. The main gun could fire Type 88 APHE rounds and
HEAT In thermodynamics, heat is energy in transfer between a thermodynamic system and its surroundings by such mechanisms as thermal conduction, electromagnetic radiation, and friction, which are microscopic in nature, involving sub-atomic, ato ...
rounds. Given its breech loader, the maximum rate of fire was only 5 rounds per minute. The gun's elevation was restricted to 30 degrees by the construction of the chassis. Other design issues included the fact that although the gun crew was protected by a
gun shield A U.S. Marine manning an M240 machine gun equipped with a gun shield A gun shield is a flat (or sometimes curved) piece of armor designed to be mounted on a crew-served weapon such as a machine gun, automatic grenade launcher, or artillery pie ...
with armour thickness of 25 mm at the front, the shield only extended a very short distance on the sides; leaving the rest of the sides and back exposed. They were rushed into service, deployed and saw combat during the Philippines Campaign in the last year of
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. Remaining units were deployed to
Okinawa most commonly refers to: * Okinawa Prefecture, Japan's southernmost prefecture * Okinawa Island, the largest island of Okinawa Prefecture * Okinawa Islands, an island group including Okinawa itself * Okinawa (city), the second largest city in th ...
in ones and twos for island defense during the
Battle of Okinawa The , codenamed Operation Iceberg, was a major battle of the Pacific War fought on the island of Okinawa Island, Okinawa by United States Army and United States Marine Corps forces against the Imperial Japanese Army during the Pacific War, Impe ...
, but were severely outnumbered by American artillery.


Soviet Union

As with the Germans of 1943, most of the
Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
designs mounted anti-tank guns, with limited traverse in casemate-style turretless hulls, in a general design format looking much like the Germans' own ''Jagdpanzer'' vehicles. The results were smaller, lighter, and simpler to build weapons that could carry larger guns than any contemporary tank, including the King Tiger. The Soviets produced high numbers of the SU-85 and
SU-100 The SU-100 ( Russian: самоходная установка-100, СУ-100 romanized: '' Samokhodnaya Ustanovka-''100) is a Soviet tank destroyer armed with the D-10S 100 mm anti-tank gun in a casemate superstructure. It was used extens ...
self-propelled guns based on the same chassis as the
T-34 The T-34 is a Soviet medium tank from World War II. When introduced, its 76.2 mm (3 in) tank gun was more powerful than many of its contemporaries, and its 60-degree sloped armour provided good protection against Anti-tank warfare, ...
medium tank; the heavier-duty powertrain and hull of the
IS-2 The IS-2 (, sometimes romanization of Russian, romanized as JS-2The series name is an abbreviation of the name Joseph Stalin (); IS-2 is a direct transliteration of the Russian abbreviation, while JS-2 is an abbreviation of the English or Germa ...
heavy tank were instead used to produce the heavier-hitting -armed
ISU-122 The ISU-122 (acronym of'' Istrebitelnaja - or Iosif Stalin-based - Samokhodnaya Ustanovka 122'') was a Soviet assault gun used during World War II, mostly in the anti-tank role. History and purpose A prototype of the ISU-122 (in Russian ИСУ ...
and -armed
ISU-152 The ISU-152 (, meaning " IS tank based self-propelled installation with 152mm caliber gun") is a Soviet self-propelled gun developed and used during World War II. It was unofficially nicknamed ''Zveroboy'' (; "beast killer") in response to seve ...
, both of which had impressive anti-tank capabilities earning each of them the Russian nickname ''Zveroboy'' ("beast killer") for their ability to destroy German Tigers, Panthers and
Elefant Elefant ( German for "elephant") was a heavy tank destroyer (self propelled anti-tank gun) used by German ''Panzerjäger'' (anti-tank units) during World War II. Ninety-one units were built in 1943 under the name Ferdinand (after its designer F ...
s. The predecessor of the ISU 152 was the SU-152, built on the KV-1s chassis and shared many similarities (including its gun) with the ISU-152. The ISU-152 built as a heavy assault gun, relied on the weight of the shell fired from its M-1937/43 howitzer to defeat tanks.Forty and Livesey 2006 p. 329 In 1943, the Soviets also shifted all production of light tanks like the T-70 to much simpler and better-armed
SU-76 The SU-76 ('' Samokhodnaya Ustanovka 76'') was a Soviet light self-propelled gun used during and after World War II. The SU-76 was based on a lengthened version of the T-70 light tank chassis and armed with the ZIS-3 mod. 1942 76-mm divisional ...
self-propelled guns, which used the same drive train. The SU-76 was originally designed as an anti-tank vehicle, but was soon relegated to the infantry-support role.Forty and Livesey 2006 p. 392


United States

U.S. Army and counterpart British designs were very different in conception. U.S. doctrine was based, in light of the
fall of France The Battle of France (; 10 May – 25 June 1940), also known as the Western Campaign (), the French Campaign (, ) and the Fall of France, during the Second World War was the German invasion of the Low Countries (Belgium, Luxembourg and the Net ...
, on the perceived need to defeat German
blitzkrieg ''Blitzkrieg'(Lightning/Flash Warfare)'' is a word used to describe a combined arms surprise attack, using a rapid, overwhelming force concentration that may consist of armored and motorized or mechanized infantry formations, together with ...
tactics, and U.S. units expected to face large numbers of German tanks, attacking on relatively narrow fronts. These were expected to break through a thin screen of anti-tank guns, hence the decision that the main anti-tank units—the Tank Destroyer (TD) battalions—should be concentrated and very mobile. In practice, such German attacks rarely happened. Throughout the war, only one battalion ever fought in an engagement like that originally envisaged (the 601st, at the
Battle of El Guettar The Battle of El Guettar took place during the Tunisia Campaign of World War II, fought between elements of the Army Group Africa under General Hans-Jürgen von Arnim, along with Italian First Army under General Giovanni Messe, and U.S. II C ...
). The Tank Destroyer Command eventually numbered over 100,000 men and 80 battalions each equipped with 36 self-propelled tank destroyers or towed guns. Only a few shots were expected to be fired from any firing position. Strong reconnaissance elements were provided so that TDs could use pre-arranged firing positions to best advantage. Flanking fire by TDs was emphasized, both to penetrate thinner enemy side armour, and to reduce the likelihood of accurate enemy return fire. All American tank destroyers were officially known by exactly the same collective term used for American self-propelled artillery ordnance, "gun motor carriage". The designs were intended to be very mobile and heavily armed. Most of the tank-hull based designs used special open-topped turrets of a differing design from the original tank it was based on, which was meant to both save weight and to accommodate a larger gun. The earliest expedient design was mounting a 75 mm M1897 field gun in a limited-traverse mount on an M3 half-track, which was designated 75 mm gun motor carriage M3. Another, considerably less successful, early design was the M6 gun motor carriage which mounted the US 37 mm anti-tank gun facing to the rear on the bed of a Dodge 3/4-ton light truck. The M3 was first used against the Japanese in the Philippines and then in the Tunisian campaign of the war in North Africa. Some were supplied to British units who used them within armoured car reconnaissance regiments for fire support. The M6 GMC was unarmoured and the 37 mm gun was ineffective against most enemy tanks by the time it entered service. By far the most common US design, and the first that was fully tracked and turreted (which became the American hallmark of World War II "tank destroyer" design) was the 3-inch gun motor carriage M10, later supplemented by the 90 mm gun motor carriage M36—both based on the
M4 Sherman The M4 Sherman, officially medium tank, M4, was the medium tank most widely used by the United States and Western Allies in World War II. The M4 Sherman proved to be reliable, relatively cheap to produce, and available in great numbers. I ...
hull and powertrain—and the 76 mm gun motor carriage M18 (Hellcat), based on a unique hull and powertrain design, with a slight visual resemblance to what was used for the later
M24 Chaffee The M24 Chaffee (officially light tank M24) was an American light tank used during the later part of World War II; it was also used in post–World War II conflicts including the Korean War, and by the French in the Algerian War, War in Algeri ...
light tank. The M18 came closest to the US ideal; the vehicle was very fast, small, and mounted a gun in a roofless open turret. The M36 Jackson GMC possessed the only American-origin operational gun that could rival the German 8.8 cm Pak 43 anti-tank gun and its tank mounted variant, the 90 mm M3 gun, and the M36 remained in service well after World War II. The only dedicated American casemate hull design fighting vehicle of any type built during the war, that resembled the German and Soviet tank destroyers in hull and general gun mounting design, was the experimental T28 super-heavy tank, which mounted a 105 mm T5E1 long-barrel cannon. This gun had a maximum firing range of 12 miles (20 km), and the vehicle was originally designed as a very heavily armoured self-propelled assault gun to breach Germany's
Siegfried Line The Siegfried Line, known in German as the ''Westwall (= western bulwark)'', was a German defensive line built during the late 1930s. Started in 1936, opposite the French Maginot Line, it stretched more than from Kleve on the border with the ...
defenses. Of these tank destroyers, only the gun of the M36 proved effective against the frontal armour of Germans' larger armored vehicles at long range. The open top and light armour made these tank destroyers vulnerable to anything greater than small-arms fire. As the number of German tanks encountered by American forces steadily decreased throughout the war, most battalions were split up and assigned to infantry units as supporting arms, fighting as
assault gun An assault gun (from , , meaning "assault gun") is a type of armored infantry support vehicle and self-propelled artillery, mounting an infantry support gun on a protected self-propelled chassis, intended for providing infantry with heavy di ...
s or being used essentially as tanks. In this sense they were an alternative to the Independent tank battalions that were attached to various Infantry Divisions. The expectation that German tanks would be engaged in mass formation was a failed assumption. In reality, German attacks effectively used
combined arms Combined arms is an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects—for example, using infantry and armoured warfare, armour in an Urban warfare, urban environment in ...
on the ground, fighting cohesively. American tank destroyer battalions comprised three tank destroyer companies supported by nine security sections. The single-purpose tactics of the tank destroyer battalion failed to account for non-tank threats. In the 1950s the goal of providing airborne forces with a parachute-capable self-propelled anti-tank weapon led to the deployment of the
M56 Scorpion The M56 "Scorpion" self-propelled gun is an American unarmored, Air assault, airmobile self-propelled gun, self-propelled tank destroyer, which was armed with a 90 mm Gun M1/M2/M3, 90 mm M54 gun with a simple blast shield, and an unprotected crew ...
and
M50 Ontos Ontos, officially the Rifle, Multiple 106 mm, Self-propelled, M50, was an American light armored tracked anti-tank vehicle developed in the 1950s. It mounted six 106 mm manually loaded M40 recoilless rifles as its main armament, which c ...
. The concept later led to the
M551 Sheridan The M551 "Sheridan" AR/AAV (Reconnaissance vehicle, Armored Reconnaissance/Airborne Assault Vehicle) was a light tank developed by the United States and named after General (United States), General Philip Sheridan, of American Civil War fame. It ...
light tank of the mid-1960s.


United Kingdom

British tanks in the early years of the war, both
infantry tank The infantry tank was a tank concept developed by the United Kingdom and France in the years leading up to World War II. Infantry tanks were designed to support infantrymen in an attack. To achieve this, the vehicles were generally heavily arm ...
s and
cruiser tank The cruiser tank (sometimes called cavalry tank or fast tank) was a British tank concept of the interwar period for tanks designed as modernised armoured and mechanised cavalry, as distinguished from infantry tanks. Cruiser tanks were develop ...
s, were (with the exception of the pre-war Matilda I design) equipped with a gun capable of use against contemporary enemy tanks—the 40 mm Ordnance QF 2 pounder. This was replaced with the 57 mm
Ordnance QF 6 pounder The Ordnance quick-firing 6-pounder 7 cwt,British forces traditionally denoted smaller ordnance by the weight of its standard projectile, in this case approximately . The approximate weight of the gun barrel and breech, "7 cwt" (cwt = hundredwe ...
when that became available. There was extra impetus given to the development of anti-tank weaponry, which culminated in the 76mm Ordnance QF 17 pounder, widely considered one of the best anti-tank guns of the war.Forty and Livesey 2006 p. 116 Towed anti-tank guns were the domain of the
Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
and vehicles adapted to mount artillery, including anti-tank self-propelled guns such as the
Deacon A deacon is a member of the diaconate, an office in Christian churches that is generally associated with service of some kind, but which varies among theological and denominational traditions. Major Christian denominations, such as the Cathol ...
(6pdr on an armoured wheeled truck chassis) and Archer (17pdr on tracked chassis) and US-supplied vehicles, were their preserve rather than the
Royal Armoured Corps The Royal Armoured Corps is the armoured arm of the British Army, that together with the Household Cavalry provides its armour capability, with vehicles such as the Challenger 2 and the Warrior tracked armoured vehicle. It includes most of the Ar ...
. The self-propelled guns that were built in the "tank destroyer" mould came about through the desire to field the QF 17 pounder anti-tank gun and simultaneous lack of suitable standard tanks to carry it. As a result, they were of a somewhat extemporized nature. Mounting the gun on the
Valentine tank The Tank, Infantry, Mk III, Valentine was an infantry tank produced in the United Kingdom during World War II. More than 8,000 Valentines were produced in eleven marks, plus specialised variants, accounting for about a quarter of wartime Britis ...
chassis in a fixed superstructure gave the Archer, looking somewhat like the light-chassis German Marder III in appearance. The 17 pounder was also used to re-equip the US-supplied
M10 tank destroyer The M10 tank destroyer, formally known as 3-inch gun motor carriage M10 or M10 BBC, was an American tank destroyer of World War II. After US entry into World War II and the formation of the Tank Destroyer Force, a suitable vehicle was needed t ...
, replacing the American 3-inch gun to produce the 17pdr SP Achilles. In 1942 the General Staff agreed on investigating self-propelled mountings of the 6-pounder, 17-pounder, 3-inch 20cwt guns and the 25-pounder field gun/howitzer on the
Matilda II The Infantry Tank Mark II, better known as the Matilda, is a British infantry tank of the Second World War.Jentz, p. 11. The design began as the A12 specification in 1936, as a gun-armed counterpart to the first British infantry tank, the mac ...
, Valentine, Crusader and Cavalier (Cruiser Mark VII) tank chassis. In October 1942 it was decided to progress using the Valentine chassis with a 17-pdr (which would become Archer) and 25-pdr (which entered service as
Bishop A bishop is an ordained member of the clergy who is entrusted with a position of Episcopal polity, authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance and administration of di ...
). While there was a general move to a general purpose gun that was usable against both tanks and in supporting infantry, there was a need to put the 17 pdr into a tank for use against the enemy's heavy tanks. The Cruiser Mk VIII Challenger was a project to bring a 17 pdr tank into use to support the Cromwell cruiser tank. Delays led to it being outnumbered in use by the
Sherman Firefly The Sherman Firefly was a medium tank used by the United Kingdom and some armoured formations of other Allies in World War II, Allies in the Second World War. It was based on the US M4 Sherman but was fitted with the more powerful British cal ...
—but a derivative of Challenger was the more or less open-topped variant ''Avenger'', which was delayed until post war before entering service. A cut-down 17 pdr, the 77mmHV was used to equip the
Comet tank The Comet tank or Tank, Cruiser, Comet I (A34) was a British cruiser tank that first saw use near the end of the World War II, Second World War, during the Western Allied invasion of Germany. The Comet was developed from the earlier Cromwell ta ...
in the last year of the war. The closest the British came to developing an armoured tank destroyer in the vein of the German Jagdpanzers or Soviet ISU series was the Churchill 3-inch gun carrier—a
Churchill tank The Tank, Infantry, Mk IV (A22) Churchill was a British infantry tank used in the Second World War, best known for its heavy armour, large longitudinal chassis with all-around tracks with multiple Bogie#Tracked vehicles, bogies, its ability to ...
chassis with a boxy superstructure in place of the turret and mounting a 3-inch anti-aircraft gun. Although a number were ordered and fifty delivered in 1942, they were not put into service as the immediate threat passed. The design was rejected in favor of developing a 17 pounder armed Cromwell tank variant, ultimately leading to the
Comet tank The Comet tank or Tank, Cruiser, Comet I (A34) was a British cruiser tank that first saw use near the end of the World War II, Second World War, during the Western Allied invasion of Germany. The Comet was developed from the earlier Cromwell ta ...
. The
Tortoise Tortoises ( ) are reptiles of the family Testudinidae of the order Testudines (Latin for "tortoise"). Like other turtles, tortoises have a shell to protect from predation and other threats. The shell in tortoises is generally hard, and like o ...
"heavy assault tank", intended for use in breaking through fixed defensive lines, was well armoured and had a very powerful 32-pounder (94 mm) gun, but did not reach service use. By 1944, a number of the Shermans in British use were being converted to Sherman Fireflies by adding the QF 17 pounder gun. Initially this gave each
troop A troop is a military sub-subunit, originally a small formation of cavalry, subordinate to a squadron. In many armies a troop is the equivalent element to the infantry section or platoon. Exceptions are the US Cavalry and the King's Troo ...
(platoon) of Shermans one powerfully armed tank. By war's end—through the production of more Fireflies and the replacement of Shermans by British tanks—about 50% of Shermans in British service were Fireflies. The Sherman Firefly, however, is not considered a tank destroyer since it could still perform the other duties of the regular
M4 Sherman The M4 Sherman, officially medium tank, M4, was the medium tank most widely used by the United States and Western Allies in World War II. The M4 Sherman proved to be reliable, relatively cheap to produce, and available in great numbers. I ...
, albeit the Firefly was less capable due to the late development of a HE round for the QF 17 pounder.


Romania

Until 1942, the Romanian tank force was equipped exclusively with obsolete R-1, R-2 and R35 tanks. Having faced big problems against Soviet T-34 and KV-1 tanks on the Eastern Front, the Romanian Army leadership sought for ways to improve its anti-tank capabilities. The initial plan was the creation of a tank comparable in characteristics to the T-34; instead, Romania went for a number of tank destroyers, since they were more adequate for its industry. The Mareșal is probably the best known Romanian AFV from the war; historians
Steven Zaloga Steven Joseph Zaloga (born February 1, 1952) is an American author and defense consultant. He received a bachelor's degree ''cum laude'' at Union College and a master's degree at Columbia University, both in history. He has published many book ...
and Mark Axworthy state that it inspired the design of the later German
Hetzer The 38 (Sd.Kfz. 138/2), originally the 38(t), known mostly post-war as , was a German light tank destroyer of the Second World War based on a modified Czechoslovakian Panzer 38(t) chassis. German armoured forces in World War II created a v ...
. Standing at only around 1.5 m tall, which would have made it very difficult to hit for its enemies, the Mareșal was a lightly armored, but highly mobile vehicle. It was armed with the Romanian 75 mm Reșița M1943 anti-tank gun, which proved to be among the best of its class during World War II, according to Mark Axworthy. During tests, the Mareșal proved to be superior in many aspects to the StuG III G, against which it competed. Those facts suggest that the Mareșal would have been an effective tank destroyer, had it been deployed into combat. There were, however, also critics of the vehicle, especially among high-ranking Romanian officials. It never saw action because the invading Soviet army had stopped its production. Other Romanian tank destroyers include the TACAM R-2 and TACAM T-60, which were converted from R-2 and T-60 light tanks respectively. Both of them saw action. One TACAM R-2 survives today and is displayed at the National Military Museum in
Bucharest Bucharest ( , ; ) is the capital and largest city of Romania. The metropolis stands on the River Dâmbovița (river), Dâmbovița in south-eastern Romania. Its population is officially estimated at 1.76 million residents within a greater Buc ...
. Another conversion was the VDC R-35, Romania's only turreted tank destroyer. Two other proposed tank destroyers existed: the TACAM R-1 and TACAM T-38.


Poland

Variants of the Polish
TKS The TK (TK-3) and TKS were Poland, Polish tankettes developed during the 1930s and used in the Second World War. Design and development The TK (also known as the TK-3) tankette was a Polish design produced from 1931 based on the chassis of the ...
and TK-3 tankettes up-armed with 20 mm gun (23–26 vehicles) were operationally deployed in the
invasion of Poland The invasion of Poland, also known as the September Campaign, Polish Campaign, and Polish Defensive War of 1939 (1 September – 6 October 1939), was a joint attack on the Second Polish Republic, Republic of Poland by Nazi Germany, the Slovak R ...
. They were used as an anti-tank component of the reconnaissance units. There were also 37 mm armed TKS-D (2 experimental vehicles) and 47 mm armed TKD (4 experimental vehicles). It is not certain whether they were used operationally at all.


France

Due to the quick defeat of France, few French vehicles were built. The Laffly W15 TCC (''Chasseur de chars'') was an attempt to quickly build a light tank destroyer by mounting a 47 mm SA37 anti-tank gun onto a lightly armoured Laffly W15T artillery tractor. Other French tank destroyers were being developed, including the SOMUA SAu-40, ARL V39 and various ad hoc conversions of the Lorraine 37L.


Subsequent developments


Missile-based tank destroyers

In the face of the Warsaw Pact, a general need for extra firepower was identified. In the late 1960s, West Germany developed the Kanonenjagdpanzer, essentially a modernized World War II Jagdpanzer mounting a gun. As Soviet designs became more heavily armoured, the gun became ineffective and the Kanonenjagdpanzers were retrofitted for different roles or retired. Some provisions were made for the fitting of a 105 mm cannon, and many of the vehicles were modified to fire HOT or TOW missiles in place of a main gun. These upgraded variants remained in service into the 1990s.Gelbart 1996 p137-8 With the development of flexible
anti-tank missile An anti-tank guided missile (ATGM), anti-tank missile, anti-tank guided weapon (ATGW) or anti-armor guided weapon is a missile guidance, guided missile primarily designed to hit and destroy armoured fighting vehicle, heavily armored military v ...
s, which were capable of installation on almost any vehicle in the 1960s, the concept of the tank destroyer has morphed into light vehicles with missiles. With the weight of
main battle tank A main battle tank (MBT), also known as a battle tank or universal tank or simply tank,Ogorkiewicz 2018 p222 is a tank that fills the role of armour-protected direct fire and maneuver in many modern armies. Cold War-era development of more po ...
s growing to the forty to seventy-tonne range, airborne forces were unable to deploy reasonable anti-tank forces. The result was a number of attempts to make a light vehicle, including the conventional
ASU-85 The ASU-85 ( – airborne self-propelled mount) is a Soviet Union, Soviet-designed Airborne forces, airborne Self-propelled artillery, self-propelled gun of the Cold War era. From 1959, it began to replace the open-topped ASU-57 in service. It wa ...
,
M56 Scorpion The M56 "Scorpion" self-propelled gun is an American unarmored, Air assault, airmobile self-propelled gun, self-propelled tank destroyer, which was armed with a 90 mm Gun M1/M2/M3, 90 mm M54 gun with a simple blast shield, and an unprotected crew ...
, the recoilless rifle-armed Ontos, and missile-armed Humber Hornet armoured truck and Sheridan light assault vehicle. The recent entries into that category are the 2S25 Sprut-SD, armed with a current-issue 125 mm tank gun that is also capable of launching missiles like the
9M119 Svir The 9K120 ''Svir'', 9K119 ''Refleks'', 9K119M ''Refleks-M'' (NATO reporting name AT-11 ''Sniper'') are laser beam riding, guided anti-tank missile systems developed in the Soviet Union. Both are designed to be fired from smoothbore 125 mm tan ...
, and Israeli-modified
Pandur II Pandurs were a type of light infantry unit raised in Central Europe. The first was Trenck's Pandurs, used by the Kingdom of Hungary from 1741, fighting in the War of the Austrian Succession and the Silesian Wars. Others to follow included Vla ...
s, which is to enter service with the
Philippine Army The Philippine Army (PA) () is the main, oldest and largest branch of the Armed Forces of the Philippines (AFP), responsible for ground warfare. , it had an estimated strength of 143,100 soldiers The service branch was established on December ...
by 2022 armed with an Elbit Turret and a 105 mm gun. Many forces'
infantry fighting vehicle An infantry fighting vehicle (IFV), also known as a mechanized infantry combat vehicle (MICV), is a type of armoured fighting vehicle and armoured personnel carrier used to carry infantry into battle and provide direct fire, direct-fire suppo ...
s (IFVs) carry
anti-tank missile An anti-tank guided missile (ATGM), anti-tank missile, anti-tank guided weapon (ATGW) or anti-armor guided weapon is a missile guidance, guided missile primarily designed to hit and destroy armoured fighting vehicle, heavily armored military v ...
s in every infantry platoon, and
attack helicopter An attack helicopter is an armed helicopter with the primary role of an attack aircraft, with the offensive (military), offensive capability of engaging ground targets such as enemy infantry, military vehicles and fortifications. Due to their ...
s have also added anti-tank capability to the modern battlefield. But there are still dedicated anti-tank vehicles with very heavy long-range missiles, and ones intended for airborne use. There have also been dedicated anti-tank vehicles built on ordinary
armoured personnel carrier An armoured personnel carrier (APC) is a broad type of armoured military vehicle designed to transport personnel and equipment in combat zones. Since World War I, APCs have become a very common piece of military equipment around the world. Acc ...
or armored car chassis. Examples include the U.S. M901 ITV (Improved TOW Vehicle) and the Norwegian NM142, both on an
M113 The M113 is a fully tracked armored personnel carrier (APC) that was developed and produced by the FMC Corporation. The M113 was sent to United States Army Europe in 1961 to replace the mechanized infantry's M59 APCs. The M113 was first used ...
chassis, several
Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
ATGM launchers based on the BRDM reconnaissance car, the British FV438 Swingfire and FV102 Striker and the German Raketenjagdpanzer series built on the chassis of the HS 30 and Marder IFV.
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
fields the NAMIS (Nag Missile System) equipped with
Nag Missile The Nag missile (), also called Prospina for the land-attack version, is an Indian third-generation, all-weather, fire-and-forget, lock-on after launch, anti-tank guided missile (ATGM) with an operational range of 500m to 20km depending on var ...
s on certain modified
BMP-2 The BMP-2 (''Boyevaya Mashina Pekhoty'', , literally "combat machine/vehicle f theinfantry") is an amphibious infantry fighting vehicle introduced in the 1980s in the Soviet Union, following on from the BMP-1 of the 1960s. Development his ...
IFV's called NAMICA. A
US Army The United States Army (USA) is the primary land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of the United Stat ...
combined arms battalion has two infantry companies with TOW missile-armed Bradley IFVs and can bring a large concentration of accurate and lethal fire to bear on an attacking enemy unit that uses AFVs. They can be complemented by mobile units of AH-64 Apache helicopters armed with Hellfire antitank missiles. Missile carrying vehicles are often referred to as anti-tank missile carriers instead of tank destroyers.


Postwar gun-based tank destroyers

Despite the proliferation of ATGMs, some gun-armed tank destroyers remain in use. China has developed the tracked PTZ89 and the wheeled PTL02 tank destroyers. The PTZ89 is armed with a smoothbore cannon while the PTL02, developed by NORINCO for the PLA's new light (rapid reaction) mechanized infantry divisions, carries a one (a version armed with a 105 mm rifled gun is available for export). The PTL02 is built on the 6×6 wheeled chassis of the
WZ551 The WZ-551 is a Chinese wheeled infantry fighting vehicle family. The name WZ-551 actually covers two families of vehicles with the official designations in the People's Liberation Army (PLA) – Type 90 and Type 92. Over 3,000 WZ-551s are in ser ...
APC. Italy and Spain use the Italian-built B1 Centauro, a wheeled tank destroyer with a cannon. Russia, meanwhile, uses the Russian-built 2S25 Sprut-SD, operating as an amphibious light tank/tank destroyer armed with a cannon. The Sabrah Pandur II is a wheeled tank destroyer variant of the Sabrah light tank developed by the
Elbit Systems Elbit Systems Ltd. is an Israel-based international military technology company and defense contractor. Founded in 1966 by Elron, Elbit Systems is the primary provider of the Israeli military's land-based equipment and unmanned aerial v ...
of Israel for the
Philippine Army The Philippine Army (PA) () is the main, oldest and largest branch of the Armed Forces of the Philippines (AFP), responsible for ground warfare. , it had an estimated strength of 143,100 soldiers The service branch was established on December ...
's future combat systems.


See also

*
Armoured warfare Armoured warfare or armored warfare (American English; American and British English spelling differences#-our, -or, see spelling differences), is the use of armoured fighting vehicles in modern warfare. It is a major component of modern Milita ...
*
Self-propelled anti-aircraft weapon An anti-aircraft vehicle, also known as a self-propelled anti-aircraft gun (SPAAG) or self-propelled air defense system (SPAD), is a mobile vehicle with a dedicated anti-aircraft warfare, anti-aircraft capability. Specific weapon systems used ...
*
Self-propelled artillery Self-propelled artillery (also called locomotive artillery) is artillery equipped with its own propulsion system to move toward its firing position. Within the terminology are the self-propelled gun, self-propelled howitzer, self-propelled mo ...


Notes


References

* * * Harry Yeide, (2005) ''The Tank Killers: A History of America's World War II Tank Destroyer Force.'' Havertown, PA: Casemate. * * * . * * * *


External links


Tankdestroyer.net

''Popular Science'', April 1940, ''Tanks Can Be Destroyed''
article on early US Army concepts for tank destroyers

{{Authority control Anti-tank weapons ms:Pemusnah kereta kebal