Lol. No, it’s only the public part. Germans disclosed the secret part which clearly stated what I said.
Soviets trained Nazi tank and artillery crew and provided them place for military training in times when they were forbidden to have heavy arms.
https://en.m.wikipedia.org/wiki/Kama_tank_school
It’s a basic history material from the secondary school maybe
The problem of sun radiation can be mitigated by dwelling underground as many early humans did so