During the Cold War (1945–1990), the two opposing forces in Europe were the Warsaw Pact countries on the one side, and the North Atlantic Treaty Organization (NATO) countries on the other side. The Warsaw Pact was seen by the West as having an aggressive force outnumbering the NATO forces.
Soviet domination of the Warsaw Pact led to effective standardization on a few tank designs. In comparison, NATO adopted a defensive posture. The major contributing nations, France, Germany, the USA, and the UK developed their own tank designs, with little in common, while the smaller nations of NATO purchased or adapted these designs.
After World War II, tank development continued largely as it had been because of the Cold War. Tanks would not only continue to be produced in huge numbers, but the technology advanced dramatically as well. Tanks became larger and their armour became thicker and much more effective. Aspects of gun technology changed significantly as well, with big advances in shell design and terminal effectiveness. However, nowadays most tanks in service still have manually breech-loaded guns, a trait of the earliest tanks which is shared with most self-propelled and field guns.
Many of the changes in tank design have been refinements to targeting and ranging (fire control), gun stabilisation, communications and crew comfort. Armour has evolved to keep pace with improvements in weaponry, and guns have grown bigger. But there have been no fundamental changes.
The design and budgeting of tanks has known severe ups and downs. Right after the war, tank design budgets were cut and engineering staff was often scattered. Many war planners believed that the tank was obsolete, now that nuclear weapons were on the scene and it was felt that a tactical nuclear weapon could destroy any brigade or regiment, whether it was armoured or not. The Korean War proved that tanks were still useful on the battlefield, given the hesitation of the great powers to use nuclear weapons. In the 1950s, many nations' tanks were equipped with NBC protection, allowing mechanized units to defend against nuclear, biological and chemical weapons, or to conduct breakthroughs by exploiting battlefield nuclear strikes.
Development of the main battle tank
Medium tanks gradually evolved into the new concept of the main battle tank. This transition happened gradually in the 1950s, as it was realized that medium tanks could carry guns (such as the US 90 mm, Soviet 100 mm, and especially the British L7 105 mm) that could penetrate any practical level of armor at long range. The World War II concept of heavy tanks, armed with the most powerful guns and heaviest armor, became obsolete since they were just as vulnerable as other vehicles to the new medium tanks. Likewise, World War II had shown that lightly armed, lightly armored tanks were of little value in most roles. Even reconnaissance vehicles shown a trend towards heavier weight and greater firepower during World War II; speed was not a substitute for armor and firepower.
An increasing variety of anti-tank weapons and the perceived threat of a nuclear war prioritized the need for additional armor. The additional armor prompted the design of even more powerful cannons. The main battle tank thus took on the role the British had once called the 'Universal tank', filling almost all battlefield roles. Typical main battle tanks were as well armed as any other vehicle on the battlefield, highly mobile, and well armored. Yet they were cheap enough to be built in large numbers. The classic main battle tanks of the 1950s were the British Centurion, the Soviet T-55 series, and the US M47 and M48 series. These three basic vehicles were upgraded significantly over time. For example, the Centurion began life with the highly effective 17-pounder (76.2 mm) gun, but was upgraded to 20 pounder (84 mm) and then 105 mm main armament by 1959, with improved fire control and new engines. The Russian T-55 started with a 100 mm gun, but has been upgraded with both 115 mm and 125 mm guns, much improved fire control systems, new engines, track, etc. The M47 series evolved through to the M60 series.The first Soviet main battle tank was the T-64 while the first American MBT was the M60 Patton.
These vehicles and their derivatives formed the bulk of the armored forces of NATO and the Warsaw Pact throughout the Cold War. Some of them remain in use in the 21st century.
Light tanks continued to be built, but for very limited roles such as amphibious reconnaissance, support of Airborne units, and in rapid intervention forces which were not expected to face enemy tanks. The Soviet PT-76 is a good example of a specialized light tank. It is amphibious and has the firepower to kill other reconnaissance vehicles, but it is very lightly armored. The US M551 Sheridan had similar strengths and weaknesses, but could also be airdropped, either by parachute or LAPES.
Heavy tanks continued to be developed and fielded along with medium tanks until the 1960s and 1970s, when the development of anti-tank guided missiles and powerful tank guns rendered them ineffective in their role. The combination of large HEAT warheads, with a long effective range relative to a tank gun, and with high accuracy meant that heavy tanks could no longer function in the stand-off, or overwatch role. Much cheaper antitank guided missiles could fill this role just as well. Medium tanks were just as vulnerable to the new missiles, but could be fielded in greater numbers and had higher battlefield mobility. Furthermore, the value of light tanks for scouting was diminished greatly by helicopters, although many light tanks continued to be fielded.
The development of antitank weapons and countermeasures
There was also talk that tanks were obsolete and budgets decreased a bit after the Yom Kippur War of 1973 when Israeli tanks were destroyed in unheard of quantities by man-portable wire guided missiles (ATGMs), fired by Egyptian infantry. Subsequent analysis showed that Israeli forces had underestimated their opponents during the first phases of the war; their all-tank tactics ignored the newfound ability of Infantry armed with cheap AT weapons to stop tanks. The solution to this new battlefield environment was both tactical and technical. Tactically, there was renewed recognition for the need for combined-arms tactics. This led to greater mechanization of Infantry and advanced artillery tactics and warheads. Tanks alone were vulnerable to Infantry, but a combined team of tanks, mechanized Infantry, and mechanized artillery could still win in the new environment.
In 1974, the United States initiated an impressive programme to modernise its existing tank fleet and start real mass production of the M60A1, and later the M60A3; at the same time the M1 was developed. Budgets for tank design and production picked up during the administration of president Ronald Reagan, following tensions between the United States and the Soviet Union.
In response to infantry-portable and vehicle-mounted ATGMS, ever more capable defences were developed. Spaced armour, composite, explosive reactive armour, and active protection systems—like the Russian Shtora, Drozd, and Arena—were added to old and new tanks. Despite these improvements the larger missiles remained highly effective against tanks. This was demonstrated in 1991 when in a friendly fire incident, Hellfire anti-tank missiles destroyed one of the latest M1 Abrams tanks.
Missile armed tanks
During the latter half of the 20th century, some tanks were armed with ATGMs (Anti-Tank Guided Missiles) which could be launched through a smoothbore or (in the case of "Shillelagh") a rifled main gun barrel with a provision to prevent imparting "spin" to the missile. In the U.S., the M60A2, M551 Sheridan, and prototype MBT-70, with 152 mm barrel/launchers used the Shillelagh infrared-guided missile.
The MBT-70 was cancelled prior to production due to high cost, and superseded by the M1 Abrams, which used a conventional gun. The M551 and the M60A2 were widely considered disappointing due to problems of overall complexity, sensitive advanced electrical systems (some components of which involved the Shillelagh guidance system) and issues related to the conventional rounds with combustible cases, though the Sheridan would serve into the 1990s before finally being withdrawn. The M60A2's were eventually replaced by M60A3s using conventional 105 mm guns.
While U.S. experiments with gun-launched missiles led to a dead end, the Soviet Union put this technology into service in the mid-1970s, and it continues to be used in CIS forces. Tanks capable of firing gun-launched missiles in Russian service include the T-72, T-90, and upgraded T-55 (T-55AM2). Ukraine also employs missile-armed T-64, T-80, and T-84 tanks.
History in the Cold War
In the Korean War M24 Chaffee's were the first U.S. tanks to fight the North Korean T-34-85s. The M24 fared poorly against these much better-armed and armored medium tanks which were superior to the M-24. M24s were more successful later in the war in their reconnaissance role, supported by heavier tanks such as the M4, M26, and M46.
The heavier but older M26 Pershing was deemed unsatisfactory due to its inferior mobility, which was unsuitable for a medium tank role as it used the same engine that powered the much lighter M4 Sherman, and in November, 1949, the upgraded M26 received a new power plant and a main gun with bore evacuator, and the M46 Patton designation. Less than a thousand were upgraded to M46 standard.
On 8 August 1950 the first M46 Pattons landed in South Korea. The tank proved superior to the much lighter North Korean T-34-85, which were encountered in relatively small numbers. By the end of 1950, 200 M46 Pattons had been fielded, forming about 15% of US tank strength in Korea; the balance of 1,326 tanks shipped to Korea during 1950 included 679 M4A3 Shermans, 309 M26 Pershings, and 138 M24 Chaffee light tanks. Subsequent shipments of M46 and M46A1 Pattons allowed all remaining M26 Pershings to be withdrawn during 1951, and most Sherman equipped units were also reequipped.
By 1953 the M24 Chaffee's were completely replaced by the new M41 tank in the United States Army which was rushed to the battlefield. It was later designated the M41 Walker Bulldog. The M41 was an agile and well armed. On the other hand, it was noisy, fuel-hungry and heavy enough to cause problems with air transport. The Walker Bulldog saw limited combat with the U.S. Army during the Korean War, but the conflict served as a testing ground to work out the tank's deficiencies, especially with its rangefinder.
British tanks, the Centurion tank with Cromwell tanks for reconnaissance, arrived in Korea in late 1950. The tanks had to operate in much colder conditions than their usual North German Plain deployments. The Centurions covered the retreat at the battle of the Imjin River and in Operation Commando were used to capture high ground earning praise from the commander of I Corps. Thereafter the war was largely static and the Centurions were used as artillery against the infantry attacks which generally happened at night.
The M47 Patton was intended to replace the M46 Patton and M4 Sherman tanks. It had a 90 mm gun and a crew of 5. Despite it being the primary tank of the US it never saw combat while in US service. In Early 1951, the U.S. initiated the design of the M48 Patton, designated the T-48 with a 90 mm cannon. The T48 featured a new turret, new redesigned hull and an improved suspension. The hull machine gunner position was removed, reducing the crew to 4. On 2 April 1953, the Ordnance Technical Committee Minutes (OTCM), standardized the last of the Patton series tanks as the M48 Patton.
Nearly 12,000 M48s were built from 1952 to 1959. The early designs, up to the M48A2, were powered by a gasoline 12-cylinder engine which was coupled with an auxiliary 8-cylinder engine. The gas engines gave the tank a short operating range and were prone to catching fire when hit. This version was considered unreliable.
The M103 was designed to counter Soviet heavies. Its long-ranged 120 mm cannon was designed to hit enemy tanks at extreme distances, but it was never used in combat. Of the 300 M103s built, most went to the Marines. The tank was relatively underpowered and the drive systems were fragile.The turret of the M103 was larger than that of the M48 or the M60 to make room for the huge 120 mm gun and the two loaders assigned to it, in addition to the gunner and the commander. The driver sat in the hull. The gun was capable of elevation from +15 to -8 degrees.
The British introduced their Heavy Gun Tank F214 Conqueror with the same 120mm gun as the M103 into service in 1955. It stayed in service until 1960; the upgrading of Centurion tank to the L7 105mm gun having removed its purpose.
While the US Army deactivated its heavy armor units with the reception of the new M60 series main battle tanks in 1960, the remaining M103s stayed within the US Marine Corps inventory until they began receiving the M60 series MBT. With the disappearance of the heavy tank from US forces came the full acceptance of the main battle tank in 1960 for the US Army, and later for the US Marine Corps.
The British successor to Centurion was Chieftain in 1966. Chieftain was heavily armoured and had a 120mm gun following a doctrine of long range fire and survivability that would be needed against the more numerous Warsaw Pact tanks in the event of an invasion of West Germany.
Vietnam War era
Tanks for the most part, saw limited action in Vietnam compare to the heavy fighting in Korea, but even in the Vietnam jungle the M48 Patton saw tank to tank duels. on March 3, 1969, the Special Forces camp at Ben Het was attacked by the NVA 202nd Armored Regiment. The 202nd was tasked with the mission of destroying the camp's 175 mm self-propelled guns. One of the PT-76s had detonated a land mine, which not only alerted the camp, but also lit up the other PT-76s attacking the firebase. Flares had been sent up, thus exposing adversary tanks, but sighting in on muzzle flashes, one PT-76 scored a direct hit on the turret of a M48, killing two Patton crewmen and wounding two more. A second Patton, using the same technique, destroyed a PT-76 with their second shot. At daybreak, the battlefield revealed the wreckage of two PT-76s and one BTR-50 armored personnel carrier.
The M48s saw extensive action during the Vietnam War, over 600 Pattons would be deployed with US Forces during the war. The initial M48s landed with the US Marines in 1965. Remaining Pattons deployed to South Vietnam were in three U.S. Army battalions, the 1-77th Armor near the DMZ, the 1-69th Armor in the Central Highlands, and the 2-34th Armor near the Mekong Delta. Each battalion consisted of approximately fifty seven tanks. M48s were also used by Armored Cavalry Squadrons in Vietnam, until replaced by M551 Sheridan tanks. The M67A1 flamethrower tank (nicknamed the Zippo) was an M48 variant used in Vietnam.
When US forces commenced redeployment operations, many of the M48A3 Pattons were turned over to the Army of the Republic of Vietnam (ARVN) forces, in particular creating the ARVN 20th Tank Regiment; which supplemented their M41 Walker Bulldog units. During the North Vietnamese Army (NVA) Easter Offensive in 1972, tank clashes between NVA T-54/PT-76 and ARVN M48/M41 units became commonplace, but on 23 April 1972, tankers of the 20th Tank Regiment were attacked by an NVA infantry-tank team, which was equipped with the new 9M14M Malyutka (NATO designation: Sagger) wire guided anti-tank missile. During this battle, one M48A3 Patton tank and one M113 Armored Cavalry Assault Vehicle (ACAV) were destroyed, becoming the first losses to the Sagger missile; losses that would echo on an even larger scale a year later during the Yom Kippur War in the Middle East in 1973.
In the mid-1970s, the M48A5 upgrade was developed to allow the vehicle to carry the heavier 105 mm gun. This was designed to bring the M48s up to speed with the M60 tanks then in regular use. Most of the M48s were placed into service with reserve units by this time. By the mid-1990s, the M48s were phased out.
The M48s performed admirably in Vietnam in the infantry-support role. However, there were few actual tank versus tank battles. The M48s provided adequate protection for its crew from small arms, mines, and rocket-propelled grenades.
The plans were laid in the US in the late fifties, for a tank with a 105 mm main gun and a redesigned hull offering better armor protection. The resulting M60 largely resembled the M48 it was based on, but has significant differences. The M60 mounted a bore evacuated 105 mm main gun, had a hull with a straight front slope whereas the M48's hull was rounded, had three support rollers per side to the M48's five, and had road wheels constructed from aluminum rather than steel.
The hull of the M60 was a single piece steel casting divided into three compartments, with the driver in front, fighting compartment in the middle and engine at the rear. The driver looked through three M27 day periscopes, one of which could be replaced by a night vision periscope. Initially, the M60 had essentially the same turret shape as the M48, but this was subsequently replaced with a distinctive "needlenose" design that minimized frontal cross-section to enemy fire. The M60 was the last U.S. main battle tank to utilize homogeneous steel armor for protection. It was also the last to feature either the M60 machine gun or an escape hatch under the hull.
Originally designated the M68, the new vehicle was put into production in 1959, reclassified as the M60, and entered service in 1960. Over 15,000 M60s (all variants) were constructed.
In 1963, the M60 was upgraded to the M60A1. This new variant, which stayed in production until 1980, featured a larger, better-shaped turret and improvements to the armor protection and shock absorbers. The M60A1 was also equipped with a stabilization system for the main gun. However, the M60A1 was still not able to fire on the move, as the system only kept the gun pointed in the same general direction while the tank was traveling cross country. It did however enable the coaxial machine gun to be brought to bear while moving.
The need for even lighter weight to make the tank transportable presented the design with a particularly difficult problem; guns capable of defeating modern tanks at reasonable ranges were so large that they demanded a large vehicle to carry them, so large that they couldn't be used as a "light" tank. The use of HEAT rounds instead of conventional penetrating ammunition could address this, but HEAT rounds work better at larger calibers. Gun weight is typically the product of caliber and muzzle velocity, so in the case of the XM551 they sacrificed the muzzle velocity, producing the low-velocity but relatively large-caliber 152 mm M81. HEAT rounds fired by the M81 could defeat any contemporary tank at shorter ranges, but its low velocity made it difficult to use at longer ranges, especially against moving targets. The large low-velocity gun was also ideal for infantry support, where higher performance anti-tank guns would often fire right through soft targets and their small-caliber guns left little room for explosive filler. The M551 Sheridan tank would thus be ideal for both direct fire support as well as short-distance anti-tank engagements.
The only niche where the M551 Sheridan was not ideal was the medium and long-range anti-tank engagement. The muzzle velocity was so low that a HEAT round fired at longer ranges would have to be "lofted", making aiming difficult, and the flight time would be so long that a moving target would be very difficult to hit. However, it appeared there was a solution to this problem by equipping the tank with gun-fired anti-tank missiles. For longer range engagements a missile would be fired instead of a HEAT round, and although its velocity would also be relatively slow, the guidance system would make a hit highly likely anyway. The M551 Sheridan appeared to offer the best of both worlds; for infantry support the large calibre gun allowed it to fire full-sized artillery rounds and canister shot, while also giving it reasonable short-range anti-tank performance from the same gun.
The M551 Sheridan had a steel turret and aluminum hull. It was powered by a large diesel engine. The M551 thus had excellent mobility, able to run at speeds up to 45 mph, which at that time was unheard of for a tracked vehicle. Swimming capability was provided by a flotation screen. Production started on late July 1966, and entered service in June 1967. More than 1,600 M551s were built between 1966 and 1970. Total cost of the M551 program was $1.3 billion.
The vehicle proved to be very noisy and unreliable under combat conditions. The armor was thin enough that it could be penetrated even by heavy machine gun rounds as well as being highly vulnerable to mines. Firing the gun would often adversely affect the delicate electronics, which were at the early stages of transitioning to solid state, so the missile and guidance system was omitted from vehicles deployed to Vietnam. The gun had problems with cracks developing near the breech after repeated firing. Most field units were modified to help address the problem but gun also was criticized for having too much recoil for the vehicle weight, the second and even third road wheels coming clear off the ground when the main gun fired.
The battle reports from the troops were sometimes glowing, while the reports higher up the chain of command were often negative. A 1969 evaluation of the vehicles found the M551 was employed in reconnaissance, night patrol and road clearing, accumulating 39,455 road miles and 520 combat missions, with a ready rate of 81.3 percent. Despite vulnerability to rockets and mines, it was judged worth applying modifications and equip all cavalry squadrons with the Sheridan.
The Sheridan was much appreciated by the infantry who were desperate for direct-fire support, which generally served in combination with ACAVs (M113s) as armored cavalry units consisted of both M113s and M551s as part of their TO&E. Armor units consisted solely of tanks (minus headquarters company) and Mechanized Infantry units consisted solely of M113s. In this role the real problem with the Sheridan was its limited ammunition load of only 20 rounds and 8 missiles (though M551s in Vietnam service were not equipped with missiles or their guidance equipment, increasing the basic load of conventional rounds).
A common field-modification was to mount a large steel shield, known as an "ACAV set" (Armored Cavalry Assault Vehicle), around the commander's 50-cal. (12.7 mm) gun, allowing it to be fired with some level of protection. The driver has an unusual rotating hatch which has vision blocks when rotated forward. Included with the set was an extra layer of steel belly armor which was bolted onto the vehicle's bottom, although only covering from the front to halfway to the end, possibly due to weight reasons.
A standard modification made during the mid-70's was the addition of the "Cereal Bowl" commander's cupola. This mod came about due to the broken rib effect that occurred when the Sheridan fired conventional rounds, the recoil would pitch the TC against the armor plating resulting in cracked ribs.
The U S Army began to phase out the Sheridan in 1978, although at the time there was no real replacement. Nevertheless the 82nd Airborne were able to keep them on until 1996. The Sheridan was the only air-deployable tank in the inventory, and as an elite force they had considerably more "pull" than general infantry and armor units who were forced to get rid of them. Their units were later upgraded to the M551A1 model, including a thermal sighting system for the commander and gunner.
The Sheridan's only air drop in combat occurred during Operation Just Cause in Panama in 1989, when fourteen M551's were deployed; four were transported by C-5 Galaxies and ten were dropped by air, but two Sheridans were destroyed upon landing. The Sheridans' performance received mixed reviews. They were lauded by their operators and some commanders as providing firepower in needed situations to destroy hard targets. However, the Sheridans' employment of only HEAT rounds limited their effectiveness against reinforced concrete construction.
Fifty-one Sheridans were deployed in the Gulf War as some of the first tanks sent. They would not be very effective against the Russian-built T-72s. Their role was limited by age and light armor to reconnaissance duties, possibly 6 or less Shillelagh missiles were fired at Iraqi bunkers, these fewer than a half-dozen missiles, were the only time that the Shillelagh had been fired in a combat environment, from the inventory of the aforementioned 88,000 missiles produced.
Several attempts to upgun or replace the Sheridan have been made, but none were successful. Several experimental versions of the Sheridan mounting a new turret carrying a 105 mm gun were made, but the resulting recoil was too great. Several possible replacements for the M551 were tested as a part of the XM8 Armored Gun System and Expeditionary tank efforts of the early and late 1980s respectively, but none of these entered service. The Stryker Mobile Gun System has replaced the light tank role of the United States.
During the 1960s, the US and West Germany entered a joint project for a new tank common to both armies and intended to enter service in the 1970s. The MBT-70 project was technically advanced with sophisticated suspension, a low silhouette, spaced armor and advanced gun systems but suffered from excessive costs and the Germans pulled out of the project at the end of the decade. After Vietnam, the M60 Patton was upgraded and designated the M60A2. It featured an entirely new low-profile turret with a commander's machine-gun cupola on top, giving the commander a good view and field of fire while under armor but spoiling the low profile. It also featured a 152 mm cannon, which fired conventional rounds as well as guided missiles.
The M60A2 proved a disappointment, though technical advancements would pave the way for future tanks. The Shillelagh/M60A2 system was phased out from active units by 1981, and the turrets scrapped. Most of the M60A2 tanks were rebuilt as M60A3.
In 1978, work began on the M60A3 variant. It featured a number of technological enhancements, including smoke dischargers, a new rangefinder, and M21 ballistic computer, and a turret stabilization system. In addition it reverted to the 105 mm cannon. All active American M60s eventually underwent the conversion to the A3 model. The M60A3 was phased out of US service in 1997.
The German Leopard tank, another 105mm armed tank, was introduced in 1965. It was sold widely to several nations in NATO as well as worldwide. It was followed in 1979 by the Leopard 2 with a 120mm smoothbore gun. In 1976, prototypes of a new tank which became the M1 Abrams were delivered by Chrysler Defense and General Motors armed with a 105 mm rifled cannon. The Chrysler Defense design was selected for development as the M1. In 1979, General Dynamics Land Systems Division purchased Chrysler Defense. The M1 Abrams came from the diverted funds from the over budget and impractical MBT-70 and XM815 projects.
The M1 was the first of its kind. It feature a low profile turret and for the first time ever on a tank, composite Chobham armor. Despite all these advances, the Abrams still retained the 4-man crew of the M60 Patton as the autoloader was considered unproven and risky. It was armed with the same L7-derived 105mm gun as the M60. Over 3200 M1 Abrams were produced and first entered US Army service in 1980. About 6,000 upgraded M1A1 Abrams were produced and used the German 120 mm smoothbore cannon, improved armor, and a CBRN protection system.
As the Abrams entered service in the 1980s, they would operate alongside M60A3 Patton. These exercises usually took place in Western Europe, especially West Germany, but also in some other countries like South Korea. During such training, Abrams crews honed their skills for use against the Soviet Union. However, by 1991 the USSR had collapsed and the Abrams would have its trial by fire in the Middle East.
The British FV4030/4 Challenger, continuing with a 120mm rifled gun for long range accuracy and the use of widest type of rounds, and protected by Chobham armor entered service in 1983.
Gulf War/Iraq war
The Gulf War saw the US Marines still charging in with their M60 Pattons while the rest of the tank forces had Abrams. The Iraqi forces were initially regular army units, equipped with tanks such as T-54/55 tanks and T-62s. The Coalition main battle tanks, such as the U.S. M1 Abrams, British Challenger 1, and Kuwaiti M-84AB were vastly superior to the Chinese Type 69 and domestically built T-72 tanks used by the Iraqis, with crews better trained and armoured doctrine better developed.
The majority of Iraqi armored forces still used old Chinese Type 59s and Type 69s, Soviet-made T-55s from the 1950s and 1960s, and some poor quality Asad Babil tanks (domestically assembled tank based on Polish T-72 hulls with other parts of mixed origin). These machines were not equipped with up-to-date equipment, such as thermal sights or laser rangefinders, and their effectiveness in modern combat was very limited.
The Iraqis failed to find an effective countermeasure to the thermal sights and sabot rounds used by the Coalition tanks. This equipment enabled them to engage and destroy Iraqi tanks from more than three times the range that Iraqi tanks could engage coalition tanks. The Iraqi crews used training rounds against the U.S. and British tanks. These rounds (purchased in great number during the Iran-Iraq War due to their cheap price) had soft steel penetrators and thus no hope of penetrating the advanced Chobham Armour of the Coalition tanks.
In the Iraqi war in 2003, an Iraqi division the 6th Armored Division of the Iraqi Army. which was equipped with T-55s and BMP-1s defending the control of key bridges over the Euphrates River and the Saddam Canal at Nasiriyah, were decimated by US Marines with M1 Abrams, and the division as a unit rendered incapable for combat during the Battle of Nasiriyah in March 2003, during the invasion.
In addition to the T-54/55 and T-62 tanks that Iraq had, the most feared to US amoured forces were the T-72 tanks in the Iraqi forces. Only Republican Guard divisions were equipped with Iraqi-modified T-72s. Many of the Iraqi T-72s were dug-in or hidden in groves, and then used to ambush the US or British tanks. In the war, the Iraqi T-72s were the preferred target for Apache helicopters and A-10s, in an attempt to diminish the combat power of Republican Guard divisions. The only chance for the Asad Babil T-72s against American tanks was to lure them to close range combat, or trying to ambush them from dug-in positions.
But even in those conditions, the M1s usually prevailed, as proven in circumstances like the Battle of Baghdad, and the drive to the capital, where dozens of Iraqi MBTs were obliterated, or near Mahmoudiyah, south of Baghdad, April 3, 2003, (Iraqi Freedom) when US tanks engaged their counterparts from just 50 yards, shattering seven enemy T-72s without losses. The Lion of Babylon T-72 was utterly outclassed by the M1 Abrams, the Challenger and by any other contemporary Western main battle tank during the 2003 invasion of Iraq.
- Front Cover Thomas W. Zarzecki (2002). Arms diffusion: the spread of military innovations in the international system. Psychology Press. p. 212. ISBN 0-415-93514-8. http://books.google.com/books?id=fhnixhMQqW8C&dq=%22main+battle+tank%22&source=gbs_navlinks_s. Retrieved 5 April 2011.
- T-64 manual ("Танк Т-64А. Техническое описание и инструкция по эксплуатации. 1984") state T-64 as "main battle" tank, while previous T-62 and T-55 (in corresponding military manuals, like "Танк Т-62. Руководство по материальной части и эксплуатации. 1968") stated as "medium" tanks
- MIL-T-45308 state "Tank, Main Battle, 105MM Gun, M60", while MIL-T-45148 state "TANK, COMBAT, FULL-TRACKED, 90MM GUN, M48A2"
- Steven J. Zaloga "M26/M46 Pershing Tank 1943–1953" ISBN 1-84176-202-4 pp.39-40
- Donald W Boose Jr."US Army Forces in the Korean War 1950-53" ISBN 1-84176-621-6 pp.52,75-86
- Centurion 1943-2003 p18-20
- Hunnicutt/p. 85 & 152
- Hunnicutt[page needed]
- Starry, p. 153
-  Washer evaluation 1969.
- Doyle, p. 44, 46
- Doyle, p. 4
- Patton Mania M60
- Development and History of the M-60 tank
- RJ Lee, Key Components of the Iraqi Ground Forces, 2002
- Scales, page 269: "As TF 1-37th Armor crossed over the ridge into the heart of the Iraqi defensive zone, the Iraqi commander's carefully disposed rear-slope defense stripped Dyer's tanks of their range advantage. Within 1,000 meters, a row of dug-in T-72s and BMPs suddenly appeared below the crest. All were hull-down in prepared positions behind thick dirt walls (thus disproving the much-quoted u.s. truism that soviet tanks had difficulties in achieving 'hull down' position). Now the Americans were well within Iraqi killing range, and although the Soviet-made night sights were markedly inferior, things could still get very dicey."
- Scales, page 270: "After the war they (TF 1-37th) returned to count the burned-out hulks of 76 T-72s, 84 BMPs, 3 air defense artillery pieces, 8 howitzers, 6 command vehicles, 2 engineer vehicles, and myriad of trucks."
- Conroy & Mars, p. 158
- "ТАНКИ ИРАКСКОЙ АРМИИ" (in Russian). otvaga2004.narod.ru. December 29, 2009. http://www.otvaga2004.narod.ru/otvaga2004/caleidoscope/iraq-tanks.htm.
- History of the tank
- Tanks in World War I
- Comparison of World War I tanks
- List of interwar armoured fighting vehicles
- Tanks in World War II
- Comparison of early World War II tanks
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