@Hitlers:
1. As the Soviet Union, build up your industry on the first round (either Leningrad or Ukraine to a major IC). All Soviet IC’s aside from Moscow only produce 3 units. This is not enough to slow or halt Barbarossa. You want to stop the Germans at the front, not on the welcome mat to Moscow.
You are not allowed to upgrade these minors to majors because the IPC value of these territories is 2; you need to have a territory value of 3 to place Major ICs
Instead, you could perhaps build a minor IC in Rostov or Ukraine.