The discussion of the German best options for the Op. Barbarossa prompted me for this thread. From early 1941, what would be the best options for the Soviets to better withstand Axis invasion? It is not much about their equipment (it's much too late to do many of the changes), but about the deployment and use of the historically available assets (units, hardware etc). For the sake of discussion, we will assume the Soviets expect the attack to commence anytime from June to July 1941.