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What if instead of going in on the Marder series of tank destroyers, someone recognizes that having a lower, fully enclosed armor chassis would make for a better self propelled AT gun/tank destroyer and not take much longer to make, so that by Spring 1942 a version of the Hetzer has bee put out instead of the Marder? Would it result in the major increase of those sorts of vehicles in production and actually reduce demand for things like StuGs? How would they perform earlier in the war vs. in 1944 when they were introduced? Would it result in less prime movers and towed AT guns once the benefits of self propelled fully tracked AT guns are seen in the field?

https://en.wikipedia.org/wiki/Hetzer
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