The M3 Light is a Soviet tier 3 premium light tank. It is currently not available from the in-game store.
The most famous light tank of World War II, with a total of 13,589 vehicles manufactured from 1941 through September 1943. 1,576 tanks (mostly of the M3A1 version) were supplied to the U.S.S.R. under Lend-Lease, and many more to the British.
It was previously available to new players for completing the in-game training course. It's slightly better than a stock M3 Stuart, but inferior to one that's been fully upgraded. Even so, don't underestimate this tank, as it still has decent top speed and a fast-firing cannon.
From the summer of 1942, when enough US medium tanks had been received, the British usually kept Stuarts out of tank-to-tank combat, using them primarily for reconnaissance. The turret was removed from some examples to save weight and improve speed and range. These became known as "Stuart Recce". Some others were converted to armored personnel carriers and were known as "Stuart Kangaroo", and some were converted command vehicles and known as "Stuart Command". M3s, M3A3s, and M5s continued in British service until the end of the war, but British units had a smaller proportion of these light tanks than US units. The other major Lend-Lease recipient of the M3, the Soviet Union, was even less happy with the tank, considering it undergunned, underarmored, likely to catch fire, and too sensitive to fuel quality. The narrow tracks were highly unsuited to operation in winter conditions, as they resulted in high ground pressures under which the tank sank into the snow. Further, the M3's radial aircraft engine required high-octane fuel, which complicated Soviet logistics as most of their tanks used diesel. However, the M3 was superior to early-war Soviet light tanks such as the T-60, which were often underpowered and possessed even lighter armament than the Stuart. In 1943, the Red Army tried out the M5 and decided that the upgraded design was not much better than the M3. Being less desperate than in 1941, the Soviets turned down an American offer to supply the M5. M3s continued in Red Army service at least until 1944.