The Germans are not invincible ...
Rather than waiting for the immense artillery and infantry of the 9. Armee to arrive, 3. Panzergruppe was a bit complacent and decided it could address the Smolensk corridor on its own.
Well, 19. Panzer Division is now looking decidedly ragged after receiving a counter-attack from a fresh mech corps. That's 10 x Pz-II and 4 x Pz-38(t) lost in one action, which cannot be replaced any time soon.
The Soviets are also trying to reduce the German air superiority a bit by launching large raids of unescorted long-range heavy bombers (DB3, IL-4) against the German frontline airfields. Losses are horrendous, and not that many German planes are destroyed but damaging the airfields reduces the German readiness which really helps rein in the anti-supply net.
These raids are only unescorted because there are just not enough fighters available near the front. We are slowly building a force of brand new LaGG-3s and whatnot behind the lines though. I really don't want to use them until they have 30+ experience though.
