Uploaded January 2023 | Updated September 2026, 2 weeks ago

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This is a reedit of one of our past videos, kindly voiced by @TheChieftainsHatch! We thank him for his assistance and urge you to go check out his channel for more tank awesomeness!

When the US joined the war in 1941, their primary light tank was the M3 Stuart and, while this vehicle was acceptable for that time, there was an interest in a new light tank. In January 1941, the US Army started the T7 Light Tank program, however, by August 6th, 1942, this tank had grown in weight and size and was now reclassified as the M7 Medium Tank. With no replacement for the Light Tank M3 in progress, the T21 Light Tank project was started.

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Article: tanks-encyclopedia.com/t21-light-tank

Sources:
Pershing: A History of the Medium Tank T20 Series, R.P Hunnicutt.
Stuart: A History of the American Light Tank, R.P Hunnicutt.
R.A.C British Army Staff (AFV) Situation Report No. 5,7,9

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Music by @WhiteBatAudio

An article by William Whynacht
Narrated by @TheChieftainsHatch
Edited by @battlehammerwot
Sound edited by @battlehammerwot