and others severely damaged. Medium tanks M4A3 The M4A3 was the last type of Sherman in U.S. service. It was roughly equal to the enemy T-34-85s and they could destroy each other at normal combat ranges. Later in the war, they were only used for artillery and reserves. M26 Pershing The M26 Pershing was named after General John J. Pershing who led the American Expeditionary Force in Europe in World War I. It was designed at the end of World War II, but saw little combat action due to its late introduction into service. Designed as a heavy tank, the Pershing was a significant upgrade from the M4 Sherman in terms of firepower with its 90 mm gun and protection. In May 1946, due to changing conceptions of the U.S. Army's tank needs, the M26 was reclassified as a medium tank. However, its mobility was unsatisfactory for a medium tank, due to the fact that it used the same engine that powered the M4A3, which was some ten tons lighter, and its transmission was somewhat unreliable. In 1948, the M26E2 version was developed with a new powerpack. The new version was redesignated as the M46 Patton and 1,160 M26s were rebuilt to this new standard. The M26 Pershing would see large scale combat deployments in the Korean War. M46 Patton The mobility of the M26 Pershing was deemed unsatisfactory for a medium tank, as it added 10 tons of weight but used the same engine that powered the much lighter M4 Sherman. Work began in 1948 on replacing the power plant in the M26 Pershing, with a more powerful engine and more reliable transmission. The Continental AV1790-3 was chosen which was capable of more than 800 hp compared to the previous engine in the M26 Pershing which was rated for only 500 hp, and was coupled with the cross-drive transmission Allison CD-850-1. Modifications continued to accumulate, and eventually the Bureau of Ordnance decided that the tank needed its own unique designation. When the rebuilding process began in November 1949, the upgraded M26 received a new power plant and a main gun with a bore evacuator, and the M46 Patton designation. Less than a thousand were upgraded to M46 standard. The M46 Patton became a completely upgraded and modernized version of the M26 Pershing, and a total of 1,168 M46 tanks were manufactured between 1949 and 1951. On 8 August 1950