Hmm, at the time the tank brigades contained 1/3 to 1/2 light tanks, T-60s, T-70s or even remnants from before, T26, BTs, T-38s, etc. so a good deal of these casualties would be these sardine tins. Even in 1943 1/3 of the tank brigade TOE was completely useless T-70s which caused no end of problems.

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