Several dozen were also sent to the Soviet Union. During World War II, the primary user of the M10 tank destroyer was the United States, but many were Lend-Leased to the United Kingdom, Canada and Free French forces. Despite its obsolescence in the face of newer German tanks like the Panther and the introduction of more powerful and better-designed types as replacements, the M10 remained in service until the end of the war. It combined thin but sloped armor with the M4's reliable drivetrain and a reasonably potent anti-tank gun mounted in an open-topped turret. The M10 was numerically the most important U.S.

Production of the two models ran from September 1942 to December 1943 and October 1942 to November 1943, respectively. An alternate model, the M10A1, which used the M4A3 variant chassis, was also produced. It mounted a 3-inch (76.2 mm) gun M7 in a rotating turret on a modified M4 Sherman tank (the M4A2 production variant) chassis. After appropriate changes to the hull and turret were made, the modified version was selected for production in June 1942 as the 3-inch Gun Motor Carriage M10 (or M10 GMC). The prototype of the M10 was conceived in early 1942 and delivered in April that year. By November 1941, the Army requested a vehicle with a gun in a fully rotating turret after other interim models were criticized for being too poorly designed. After US entry into World War II and the formation of the Tank Destroyer Force, a suitable vehicle was needed to equip the new battalions.

The M10 tank destroyer was an American tank destroyer of World War II.

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