But that would leave the army advance flanks over exposed as I said before. And funny that you mention the distance between Paris and the German front, because their logistic situation was far better and didn't need the advance- stop- advance nature of the attack that we see in Barbarossa due to logistics. Also in September and October you are also getting mud adding to the difficulty. The encirclement in Kiev wasn't a bad move based on previous german experiences, and honestly I think it falls under the myth popularize by post war german generals of saying that everything wrong was due to the mustache man and the SS, instead of accepting the fact that they were at fault too (or God forbid, that Hitler took some decisions that weren't bad on the operational level).
According to Nigel Askey Army Group South (AGS) had the capacity to finish off the Kiev pocket on its own, without help from AGC, which I thought was interesting. Had AGC been allowed to continue towards Moscow unhindered, the city would have fallen before winter, before Russia could raise all those forces from the region that historically threw the Germans back in the winter of 1941-42, before Russia could have built the fortifications that were historically built during the fall-winter of 1941, that then stopped the Germans almost at the gates of Moscow. The capture of Moscow in the fall of 1941 would have removed a substantial amount of Russian forces from the equation as well as a very substantial amount of the Russian industrial base. As I recall, up to 30% of the USSR's industry was still in the Moscow region in December 1941. And let's not forget, the fall of Moscow would have cut off the central point of the Russian railway network and likely meant the fall of Leningrad and major supply problems for the Red Army.
Would all this have resulted in an Axis victory in WW2? Perhaps not. The US would still have entered the war and lend-lease would have likely been even greater than it was historically (up to 25% of total Soviet production during 1941-1945, but lend-lease often contributed to many times the domestic production in many vital types of materiel and resources, such as transportation and high-octane fuel).
Since the impact of lend-lease was discussed, I suppose I could copy a few posts I made on the topic a couple of months back on Discord:
"Here's figures on American (no British, Canadian or others included) lend-lease that I've attempted to sum up based on newer, post-Soviet research. The percentage figures refer to the percentage of the total of that category wielded by the USSR during the GPW:
Aviation fuel: 2,586,000 tons, or 57.8%, of which 97% had an octane level of 99 or higher. By contrast, domestic production of high-octane fuel made up a tiny fraction of total production. On the eve of Barbarossa the USSR had enough of the 78 octane B-78 aviation fuel, the best they could produce, to meet only 4% of its requirements. From August 1941 to September 1945 lend-lease gasoline exceeded Soviet production proper by 1.4 times, although if taking into account octane levels it exceeds Soviet production many times.
Automobile fuel: 242,300 tons, or 2.8%, although again, this was high-octane fuel, so the real percentage is higher.
Motor vehicles: c. 510,284, of which at least 460,000 were trucks and light transports, of which 24,902 were light trucks and 351,715 medium trucks supplied by the US. US supplied trucks alone contributed 897,964 tons of lifting capacity, over 2.5 times the 354,780 ton lifting capacity of the 197,100 trucks the USSR produced during WW2, the latter which was comprised mostly of 1.5t commercial models. Altogether lend-lease trucks exceeded Soviet production more than twice over, and that's not including light transports. Included in the motor vehicles are also 32,300 motorcycles, which exceeded Soviet production by 1.2 times (27,816 motorcycles).
Railroad: 622,100 tons of rails, 56.6% of Soviet production. If excluding narrow gauge rails not supplied by lend-lease, American deliveries comprise 83.3% of the total volume of Soviet production. production. If excluding production during the second half of 1945, accepting it as being equal to at least half of yearly production (actually, considerably more than half the annual production of rails occurred in the second half of 1945 because of the curtailment of purely military production), then lend-lease in rails made up 92.7% of the overall volume of Soviet rail production.
Locomotives: Lend-lease delivered 1,900 locomotives and 66 diesel-electric locomotives. Soviet production of locomotives in 1941-45 was 798. Probably most of the 706 produced in 1941 were produced before the war and the 8 in 1945 after the war but let's be generous and presume half of those were produced during the war, thus the number is 441. The USSR produced 1 diesel-electric locomotive in 1941, don't know if before or during the war. Thus lend-lease exceeded Soviet production of regular and electric-diesel locomotives by over 4.3 times and 26 times respectively.
Railway wagons: Lend-lease delivered 11,075 railway wagons, whilst the USSR produced between 1942 and 1945 only 1,087 wagons. The USSR did produce 33,096 wagons in 1941, but judging by the sharp decline these were probably produced mostly pre-war. Likely we are looking at lend-lease providing some 8-10 times the volume of Soviet wartime production here.
Explosives and copper: 348,100 tons of explosive materials supplied by lend-lease, 53% of Soviet production (c. 600,000 tons). Soviet production of non-ferrous metals from 1941 to 1945 remain a secret (one can only wonder why), but it is estimated that 470,000 tons of copper were produced from mid-1941 to the end of the war in 1945. US lend-lease supplied the USSR with 359,600 short tons of copper ore and 52,100 short tons of electrolyctic and refined copper. These equivalate to about 387,600 tons of ore, or 82.5% of Soviet wartime production. Additionally 956,700 miles of field telephone cable, 2,100 miles of sea cable and 1,100 miles of underwater cable were delivered, which helped alleviate the Russian copper shortage. Moreover, lend-lease provided the USSR with 35,800 radio stations, 5,899 radio receivers and 348 radars, which satisfied the basic requirements of the Red Army.
There's still aluminium, aircraft, steel and armoured vehicles, artillery, tires and food, machine tools and non-lend-lease aid to cover, but I haven't summarised those.
The following figures are from Boris Sokolov's
The Role of the Soviet Union in the Second World War: A Re-examination. They're un-summarised and I haven't corroborated the figures with other sources, but as far as I could tell the only mistakes possibly on the list is that the amount of lend-lease is actually erronously
smaller than what it should be. E.g. Sokolov mentioned only 409,500 American motor vehicles lend-leased to the USSR, short by over 100,000 of the real number!"
And here's a few points from Nigel Askey: