M24 Chaffee Tank: America’s Late-War Light Tank

The M24 Chaffee was the last American light tank of the Second World War and the best light tank built by the United States during the conflict. Developed in 1943 as a replacement for the M3 and M5 Stuart, it mounted a 75 mm gun in a turret, giving it firepower comparable to the early Sherman, and it was fast, reliable, and well protected for a light tank. About 4,731 M24 Chaffees were built between 1943 and 1945, and they served in the Battle of the Bulge, in the final advance into Germany, and after the war in Korea, Indochina, and many other conflicts.

The M24 Chaffee was named after Major General Adna R. Chaffee, the father of the American armoured force, and it was a major advance over the Stuart. The Stuart’s 37 mm gun had proved inadequate against German tanks, and the Army needed a light tank with a larger gun that could still perform reconnaissance. The M24 answered that need, with a 75 mm gun, a torsion-bar suspension, and a low silhouette. It entered service in late 1944, too late to see extensive combat in the Second World War, but it proved itself in the Ardennes and in the Rhine crossing, where its crews praised its gun, its mobility, and its reliability.

Today the M24 Chaffee is remembered as one of the best light tanks of the war, a vehicle that was well designed for its role and that served for decades after the war in many countries. Surviving examples are numerous, in museums and in private collections around the world, and the type is well represented in the literature on American tanks. For historians of armoured warfare, the M24 illustrates the maturity of American light tank design, and the value of a light tank that could fight as well as scout.

1. Key Facts

Field	Value
Type	Light tank
Origin	United States
Designed	1943 (to replace M3/M5 Stuart)
In service	1944–1950s (United States); later with many other users
Produced	Approximately 4,731
Manufacturers	Cadillac, Massey-Harris
Crew	5 (commander, gunner, loader, driver, assistant driver/bow gunner)
Weight	Approximately 18.4 tons
Length	Approximately 5.49 m (18 ft)
Width	Approximately 2.85 m (9 ft 4 in)
Height	Approximately 2.48 m (8 ft 2 in)
Armour	Up to 38 mm
Main armament	75 mm M6 gun
Secondary armament	Two 7.62 mm Browning machine guns (one coaxial, one in bow)
Engine	Two Cadillac Series 44T24 V8 petrol engines, approximately 220 hp total
Speed	Approximately 56 km/h (35 mph) maximum on roads
Range	Approximately 160 km (100 miles) on roads

2. Background and Development

The Stuart’s Limitations

The M24 Chaffee grew out of the limitations of the M3 and M5 Stuart, which had served as the standard American light tank since 1941. The Stuart’s 37 mm gun had proved inadequate against German tanks, and its armour was thin. In North Africa and in Europe, Stuart crews found themselves outgunned by German tanks, and the Army needed a new light tank with a larger gun. The requirement was for a light tank that could perform reconnaissance, that was fast and mobile, and that had a gun capable of dealing with German tanks and of providing fire support for infantry. The M24 was the answer, and it was developed quickly, with the first prototypes ready in 1943.

Design and Production

The M24 was designed by Cadillac, which had built the M5 Stuart, and it used two Cadillac V8 engines, a torsion-bar suspension, and a new turret mounting a 75 mm gun. The 75 mm gun was a lightweight version of the Sherman’s gun, and it could fire high-explosive and armour-piercing shells. The M24’s hull was low and well sloped, and its armour, up to 38 mm, was thicker than the Stuart’s. Production began at Cadillac and at Massey-Harris in 1944, and about 4,731 M24 tanks were built. The M24 entered service in late 1944, and it was issued to the cavalry reconnaissance squadrons of armoured divisions and to light tank companies.

Doctrine and the Reconnaissance Role

American doctrine assigned the M24 to reconnaissance units, where its speed and its gun made it well suited to probing enemy positions and to screening the advance of larger formations. The M24 was also used for supporting infantry, for escorting convoys, and for patrolling. In theory, the M24 was not meant to fight enemy medium tanks, but its 75 mm gun gave it a useful anti-tank capability, and in practice M24 crews often found themselves in combat with German tanks. The doctrine was sound, and the M24 was used as it was intended, for scouting and for security, rather than for direct combat. Its gun, however, made it a more capable fighting vehicle than the Stuart, and its crews valued its firepower.

3. Design

Hull, Tracks and Mobility

The M24 Chaffee had a low, well-sloped hull, with a torsion-bar suspension that gave it a good ride and good cross-country mobility. The suspension was a major advance over the Stuart’s vertical volute spring suspension, and it allowed the M24 to travel faster over rough ground. The two Cadillac V8 engines, mounted in the rear, produced about 220 horsepower in total, and they gave the M24 a top speed of about 56 km/h and a range of about 160 km. The M24 was fast and reliable, and its crews valued its mobility. The tank’s low silhouette, about 2.48 m high, made it hard to spot, and its tracks were wide enough to give good performance in mud and snow.

Armour and Protection

The armour of the M24 was up to 38 mm thick, and it was sloped on the hull and turret to improve protection. The hull was built from steel plates welded together, and the turret was also welded. The armour was proof against rifle bullets, machine-gun fire, and shell splinters, and it could resist the German 20 mm gun at longer ranges, but it was not proof against anti-tank guns. The crew had better protection than in the Stuart, but the M24 was still a light tank, and it relied on speed and on concealment rather than on armour. The M24’s protection was adequate for a reconnaissance vehicle, and it was a major improvement over the Stuart.

The Turret and the 75 mm Gun

The turret of the M24 was a three-man turret, with a commander, a gunner, and a loader, and it mounted the 75 mm M6 gun and a coaxial machine gun. The 75 mm gun was a lightweight version of the Sherman’s gun, and it could fire high-explosive shells against infantry and fortifications, and armour-piercing shells against tanks. The gun was a major advance over the Stuart’s 37 mm gun, and it gave the M24 a firepower that was comparable to the early Sherman. The turret was roomy for a light tank, and the crew had good visibility from the commander’s cupola. The 75 mm gun was the M24’s greatest strength, and it was the reason the vehicle was valued by its crews.

Armament, Crew and Ergonomics

The crew of the M24 was five: a commander, a gunner, a loader, a driver, and an assistant driver who also operated the bow machine gun. The three-man turret was a major improvement over the Stuart’s two-man turret, because it allowed the commander to command the tank without also having to load the gun. The M24 carried about 48 rounds for the 75 mm gun and a large number of rounds for the machine guns. The vehicle had a radio set, and its internal communications were good. The M24’s ergonomics were good for a light tank, and its crews generally praised its layout, its visibility, and its gun. The M24 was a well-designed vehicle, and its crew layout was one of its strengths.

4. Variants

The Production M24

About 4,731 M24 Chaffees were built in a single production run, with minor changes during production. There was no separate mark system, and the changes were introduced gradually on the production line. Early vehicles had a different arrangement of stowage, while later vehicles had improvements to the gun mounting and to the engine. The M24 was the only version built, and it remained in service in its original form throughout the war. The production run was completed in 1945, and no further M24 tanks were built after the war, although the type remained in service in many countries for decades.

The M24 in French and Other Service

After the war, M24 Chaffees were supplied to many countries, including France, which used them in Indochina and in Algeria, Britain, which used them for training, and many others. The French M24s saw extensive combat in Indochina, where they were used to support infantry in the jungle and in the mountains, and they were among the last M24s to see combat in French service. The M24 also served in Korea with American and South Korean forces, and it was used in the Korean War in 1950-1953. The M24’s post-war service was extensive, and it shows that the vehicle was regarded as useful even after the war, and that its 75 mm gun was still a capable weapon.

The M19 and Other Derivatives

The M24 chassis was used as the basis for other vehicles, including the M19 multiple gun motor carriage, an anti-aircraft vehicle with two 40 mm Bofors guns, and the M37 self-propelled howitzer, with a 105 mm howitzer. The M19 and M37 were built in small numbers and served after the war. The M24 chassis was also used for other experimental vehicles, including a flamethrower tank and a bridge-layer. The M24’s chassis was thus a versatile basis for other vehicles, and its design influenced American armoured vehicle design for many years. The M24’s derivatives are a measure of the quality of its chassis and suspension.

5. Operational History

The Battle of the Bulge

The M24 Chaffee entered combat in December 1944, during the Battle of the Bulge, where it served in the cavalry reconnaissance squadrons of armoured divisions. The first M24s to see combat were with the 744th Tank Battalion, and they fought in the Ardennes against German tanks and infantry. The M24’s 75 mm gun proved effective against German tanks, and its crews praised its mobility and its reliability. The Battle of the Bulge was a severe test for the M24, with cold, snow, and mud, but the vehicle performed well, and it earned a reputation as a capable light tank. The M24’s service in the Bulge was its combat debut, and it was a successful one.

The Rhine and the Advance into Germany

In the final months of the war, M24 Chaffees served in the crossing of the Rhine and in the advance into Germany, where they provided reconnaissance and fire support for armoured divisions. The M24’s speed and its gun made it useful in the mobile warfare of 1945, and its crews valued its ability to keep up with medium tanks. The M24 also served in the liberation of Czechoslovakia and in other final operations. The M24’s service in 1945 was honourable but limited, because the vehicle arrived late in the war and because the war ended soon after it entered service. The M24 remained in service until the end of the war, and it was withdrawn from American service in the 1950s.

Korea and Indochina

After the war, the M24 served in Korea, where it was used by American and South Korean forces in the early months of the war in 1950. In Korea, the M24’s 75 mm gun proved inadequate against the Soviet T-34/85, and the M24 was soon replaced by the M4 Sherman and the M26 Pershing. The M24 also served in Indochina with French forces, where it was used to support infantry in the jungle and in the mountains, and it was among the last M24s to see combat in French service. The M24’s service in Korea and Indochina shows that the vehicle was still useful after the war, but that it was overtaken by heavier tanks.

6. Performance and Specifications

Strengths on the Battlefield

The strengths of the M24 were its gun, its mobility, and its reliability. The 75 mm gun gave it firepower comparable to the early Sherman, and it could deal with German tanks and with infantry. The torsion-bar suspension gave it good cross-country mobility, and its low silhouette made it hard to spot. The M24 was reliable and easy to maintain, and its standard Cadillac engines meant that spare parts were available. The M24 was at its best when it was used as it was intended, for reconnaissance and for fire support, rather than for tank-versus-tank combat. Its gun and its mobility made it a useful vehicle, and its crews valued its firepower.

Weaknesses and Trade-offs

The weaknesses were the thin armour, the short range, and the vulnerability to anti-tank guns. The M24’s armour, up to 38 mm, was proof against machine guns but not against anti-tank guns, and the tank was vulnerable to mines. The range of about 160 km was short, and the M24 needed frequent refuelling. The 75 mm gun, although capable, was inadequate against the Panther and the Tiger at longer ranges, and the M24 was not meant to fight medium tanks. These weaknesses were the price of building a light tank, and they were accepted because the M24 was a reconnaissance vehicle, not a battle tank.

How the M24 Compared with Rivals

Compared with the German Panzer II Luchs, the M24 had a more powerful gun and thicker armour, but it was larger and less agile. Compared with the Soviet T-70, the M24 was better armed and better protected, but it was heavier and slower. Compared with the British Cromwell, the M24 was smaller and less well armed, but it was faster and more reliable. The M24 was thus a capable light tank by the standards of 1944, and it was the best American light tank of the war. Its comparison with its rivals shows its strengths and its limitations, and it was a vehicle that was well designed for its role.

7. Comparison

Against the M5 Stuart

The M5 Stuart and the M24 Chaffee were the two American light tanks of the war, and the M24 was developed directly as a replacement for the Stuart. The Stuart had a 37 mm gun and a two-man turret, while the M24 had a 75 mm gun and a three-man turret. The M24 was faster, better protected, and better armed than the Stuart, and it was a major advance in every respect. The Stuart was a good tank for its time, but the M24 was a better tank, and it was the M24 that served in the final months of the war and after it. The comparison shows how American light tank design evolved in a short time.

Against the Sherman

Among American tanks, the closest comparison is with the Sherman, which was the standard American medium tank. The M24 had the same 75 mm gun as the early Sherman, but it was smaller, lighter, and faster, and it had thinner armour. The Sherman was a battle tank, designed to fight enemy tanks and to support infantry, while the M24 was a reconnaissance tank, designed to scout and to provide fire support. The M24 could not replace the Sherman, but it could complement it, and the two types served side by side in armoured divisions. The comparison illustrates the division of labour between light and medium tanks in the American Army.

8. Legacy and Influence

The Best American Light Tank of the War

The M24 Chaffee is remembered as the best American light tank of the Second World War, a vehicle that was well designed for its role and that served for decades after the war in many countries. The type was produced in large numbers, and it served in the Battle of the Bulge, in Korea, in Indochina, and in many other conflicts. The M24’s legacy is as a light tank that could fight as well as scout, and that was valued by its crews for its gun and its mobility. The M24 remains a landmark in American tank design, and it is remembered as one of the best light tanks of the war.

Reputation and Historical Assessment

Historians have generally regarded the M24 as a successful design, a vehicle that was well suited to its role and that was used effectively by American reconnaissance units. Its service in the Ardennes and in the Rhine crossing is well documented, and its crews are remembered for their skill in using the 75 mm gun. The M24 is also remembered as a symbol of American tank design in the later war, and as a vehicle that was, for a time, the standard light tank of the United States Army and of many other armies. Its reputation has been helped by the survival of examples in museums, and by the work of historians who have studied American tanks in detail.

Lessons for Later Tank Design

The lessons of the M24 were clear: a light tank needed a powerful gun, a three-man turret, a torsion-bar suspension, and good mobility, and it did not need heavy armour if it could avoid being hit. The M24’s successor, the M41 Walker Bulldog, incorporated these lessons, and it became the standard American light tank of the Cold War. The M24 also showed that a light tank could be a useful fighting vehicle, not just a scout, and that its gun was as important as its speed. The M24’s design influenced American light tank design for many years, and its 75 mm gun became a feature of later American light tanks.

9. Surviving Examples

Museums in the United States and Europe

A large number of M24 Chaffee tanks survive in museums in the United States and in Europe, including the National Armor and Cavalry Museum at Fort Benning, which holds an example in its collection, and the Tank Museum at Bovington in Britain, which also holds an example. The M24 is one of the most widely preserved American tanks of the war, and it is displayed in museums in many countries. The survival of so many M24 vehicles reflects the large production run and the long post-war service, and they are an important part of the military heritage of many countries.

Survivors Abroad and Running Examples

Other M24 vehicles survive outside museums, in private collections, and a number have been restored to running condition. M24 tanks are regularly seen at military vehicle shows, and at least one M24 is maintained in running condition in the United States. The M24’s survival in large numbers reflects its production run and its long service, and it ensures that future generations can see the tank that served in the Bulge, in Korea, and in Indochina. The running examples are particularly valuable, because they demonstrate the M24’s mobility and its distinctive engine note.

10. Frequently Asked Questions

How many M24 Chaffee tanks were built?
About 4,731 M24 Chaffee tanks were built between 1943 and 1945 by Cadillac and Massey-Harris. They were the last American light tank of the Second World War.

What gun did the M24 Chaffee carry?
The M24 carried a 75 mm M6 gun in a three-man turret, plus two 7.62 mm Browning machine guns. The 75 mm gun gave it firepower comparable to the early Sherman.

Where did the M24 Chaffee first see combat?
The M24 first saw combat in December 1944, during the Battle of the Bulge, where it served in the cavalry reconnaissance squadrons of armoured divisions. Its crews praised its gun and its mobility.

Was the M24 Chaffee used in Korea?
Yes. M24 tanks served in Korea in 1950 with American and South Korean forces, but their 75 mm gun proved inadequate against the T-34/85, and they were soon replaced by heavier tanks.

What replaced the M24 Chaffee?
The M41 Walker Bulldog, which entered service in the early 1950s, replaced the M24 as the standard American light tank. The M24 remained in service in many other countries for decades.

Does an M24 Chaffee survive today?
Yes. Many M24 tanks survive in museums in the United States and Europe, including at Fort Benning and at Bovington, and a number are in private collections and in running condition.

11. Sources

• Steven J. Zaloga, M24 Chaffee Light Tank 1943-85 (Osprey Publishing, New Vanguard series).
• R. P. Hunnicutt, Stuart: A History of the American Light Tank (Presidio Press).
• The National Armor and Cavalry Museum, Fort Benning, M24 collection records and vehicle guides.
• Chamberlain, Peter, and Ellis, Chris, British and American Tanks of World War II (Arms and Armour Press).
• David Doyle, American Light Tanks (Squadron Signal Publications).
• US War Department, M24 Light Tank technical manual (wartime publication).