Throughout much of World War II, the U.S. Army relied heavily on the M3/M5 Stuart tank, a nimble and fairly reliable vehicle up to that point; however, since the Stuart series dated back to the 1930s, its design had become obsolete.
A newer and stronger light tank, one that was just as maneuverable as the Stuart but more resilient, was needed.
The development of this new light tank began in 1943 and would come into service about a year later in 1944 as the M24 Chaffee tank.
What Type of Tank Was Needed to Replace the Stuart and Sherman Tanks?
The M3 Sherman tank design was deemed outdated and a new light tank needed to be faster, with a bigger engine and bigger guns while also having thicker armor that offered better protection.
The first prototype developed was the T7, which ticked all those boxes, but at a greatly increased weight especially once loaded.
The T7 was later designated as a medium tank and the development of a new light tank continued.
Keeping the weight as light as possible while increasing armor protectiveness remained a key focus of this project.
Further World War II Tank Developments
The T24 was the next development that was built by Cadillac, which had built the M5 Stuart Tank and had improved on the design of the T24 by adding new ideas like a self-propelled artillery system, sloping armor, and a larger turret.
They added wider tracks, a newer torsion bar suspension, and a new improved transmission, making it more capable.
Lastly, a redesigned version of the 75mm gun from the B-25 Mitchell medium bomber tank was added, the same one that was used on the M4 Sherman tank but with a modified recoil system.
This updated T24 was designated as the M6.
After Final Corrections – The M24 Chaffee Tanks Emerged
After the delivery of the first T24/M6 WW2 tank prototypes by Cadillac, the tanks went through rigorous testing at the end of 1943, after which a number of problems with the recoil system were noted and corrected.
With a few more minor modifications, the successful design was designated as the M24 and throughout 1944 and into 1945, almost 5,000 M24 Chaffee tanks would be produced and put into use in Europe.
The Final World War II M24 Chaffee Tanks
The finished M24 tank design weighed in at around 19 tons, well within the light tank range in part due to its only 1.5” thick armor, but the sloping redesign afforded greater protection against heavier artillery without increasing the armor thickness.
Propelled by 2 Cadillac V-8 engines, equipped with multiple machine guns in addition to the 75mm turret gun, and operated by a crew of 5, the M24 Chaffee tank could travel up to 35 MPH and go 175 miles on a single 100-gallon tank of gas.
Named after Major General Adna R. Chaffee, Jr who was known as the Father of the Armored Force, the World War II M24 Chaffee tank offered some great improvements over its predecessors including faster speed and easier maneuverability, especially in the snow.
It quickly became a favorite among U.S. forces during World War II and was even used in Japan and Korea.
Though the M24 Chaffee was eventually replaced by the M41 in the 1950s, it was one of the most favored and widely used US WW2 tanks and the last American light tank model to see extensive combat before its retirement.
Since that time, the reliable M24 chassis has been used for the development of several other tanks.
Today, some M24 Chaffees can still be seen in tank museums throughout the country.