Comparing: T56 GMC vs. Marder II

Development of a 3 inch self-propelled gun on the M3A3 Stuart chassis started in September 1942. Trials on the Aberdeen Proving Ground in November demonstrated that the gun was too heavy for the light tank chassis. Never entered mass production.

Light tank destroyer developed in early 1942 based on the chassis of the outdated, but massively produced, Pz.Kpfw. II, and fitted with a powerful gun. The vehicle saw wide use on the Eastern Front; from 1944, it also fought in Italy and on the Western Front. The tank destroyer was in service until the end of the war.