T20 Medium Tank T20 Medium Tank The Medium Tank T20 was part of a series of medium tanks designed by the United States during the Second World War, to be the successor to the Medium Tank M4 "Sherman", and culminated in the M26 Pershing. Almost immediately after the M4 Sherman was standardized, the US Ordnance Department started work on a successor. The Ordnance Department had already been working on heavily armored infantry tank design for the British, using M4 parts. The new project was started on the 25 May 1942, it was originally designated M4X. Starting with the T20, the Ordnance Department initially
Tanks in the Cold War 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. After World War II, tank design budgets were cut and engineering staff was often scattered. Many war planners believed that with the advent of nuclear weapons the tank was obsolete, given 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,