The T20 tank reached a mock-up stage in May 1942, and was intended as an improved medium tank to follow the M4. Army Ordnance began work on a follow-up tank. In the spring of 1942, as the M4 Sherman was entering production, U.S. These features accounted for the high silhouette and large side sponsons that were characteristic of the M4 lineage. The large diameter of the radial engines in M4 tanks added to the hull height. This layout required a driveshaft to pass under the turret, which increased the overall height of the tank, a characteristic shared with German tanks of World War II that also used this layout. These tanks all had rear-mounted Continental air-cooled radial aircraft engines and a front sprocket drive. Army's first lineage of tanks evolved from the M1 Combat Car and progressed to the M2 Light Tank, M2 Medium Tank, M3 Lee, and finally the M4 Sherman. This series of prototype vehicles began as medium tank project that was similar to, but more modern than the recently introduced M4 Sherman, and ended several years later as the U.S. Some of these were experimental dead-ends, but many became permanent characteristics of subsequent U.S. Several design features were tested in the prototypes. Army tanks that had ended with the M4 Sherman. The M26 was the culmination of a series of medium tank prototypes that began with the T20 in 1942, and it was a significant design departure from the previous line of U.S. The lineage of the M26 continued with the M47 Patton, and was reflected in the new designs of the later M48 Patton and M60 Patton. It was withdrawn in 1951 in favor of its improved derivative, the M46 Patton, which had a more powerful and reliable engine and advanced suspension. Hunnicutt ranked the Pershing behind the German Tiger II heavy tank, but ahead of the Tiger I heavy and Panther medium tanks.

Based on the criteria of firepower, mobility, and protection, US historian R. The M26 was intended as a replacement of the M4 Sherman, but a prolonged development period meant that only a small number saw combat in Europe. Pershing, who led the American Expeditionary Force in Europe in World War I.

The tank was named after General of the Armies John J. It was used in the last months of World War II during the Invasion of Germany and extensively during the Korean War. The M26 Pershing is a heavy tank/ medium tank formerly used by the United States Army.

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