To operate the rail lines, the Germans had to regauge rail sidings and marshalling areas and, depending on battle damage, to repair buildings and equipment at the train stations.{14} On the most important rail line in Barbarossa, the tracks from Brest directly toward Moscow, the Germans completed the line from Brest to Oranczyce by 29 June 1941 and began to move German trains on normal-gauge track on 30 June. That day. four supply trains arrived at Oranczyce, 85 km into the Soviet Union, with approximately 2,000 tons of supplies. Meantime, regauging of Russian lines continued with work being completed to Baranovice junction by 2000, I July, and three trains reaching that city, 210 km into the Soviet Union. The Germans continued their impressive pace of building a normal-gauge rail system into White Russia and completed regaug-ing from Brest to the capital, Minsk, at noon on 5 July. Army Group Center ran four supply trains there the same day, more than 330 km into the Soviet Union.{15} By 5 July, the Germans began to develop a great rail head at Minsk, which capably supported the lightning panzer advance to Smolensk that overran the city on 16 July. In a historic performance, the Germans regauged the Russian rail system from Brest to Minsk by early July and extended construction to Smolensk before the end of the same month. Their performance established a logistical system able to support an offensive toward Moscow before the middle of August 1941 and bridge the gap between Smolensk and Moscow in a single offensive, similar in style to the earlier leaps to Minsk and Smolensk.
That generalization derives from the actions of Army Group Center from the middle of July to early August 1941. On 15 July 1941, the quartermaster general reviewed the supply status of, Army Group Center in terms of its capabilities to continue offensive operations. He made it clear that the great rail head for continuing operations lay in the cities of Minsk and Molodecno, no longer on the prewar frontier. The army group then had 45,450 tons of 60-ton truck columns and, deducting one-third as inoperable at any time and in repair, still had approximately 30,700 tons available for continuous operations.{16} In mid-July 1941 the German army transportation chief guaranteed the substantial total of fourteen trains and 6,300 tons of supplies daily for the Minsk-Molodecno base. The quartermaster general averred that, based on the logistical situation of 15 July 1941, Army Group Center could conduct an offensive on Moscow with four panzer, three motorized infantry, and ten infantry divisions with appropriate army reserves, maintaining the remainder of the army group in static fighting around Smolensk. This logistical feat was moderately impressive for the middle of July, with enough trains arriving at the Minsk-Molodecno railroad and more than enough trucks to move a panzer group and an infantry army to Moscow. Meanwhile, the Germans were fighting the battle of Smolensk and would take two more weeks to finish the job and another week to tidy up operationally. The Germans used this time to build up logistic stockpiles at the rail head in the center of White Russia and regauge the main rail line from Minsk through Orsha into Smolensk{17}.
By the second week of August 1941, Army Group Center regained operational freedom of movement. If the army group had been directed by Hitler and OKH at the end of July 1941 to continue operations toward Moscow as soon as possible, it would have eliminated remnants of Soviet forces in the great pocket just north of Smolensk and cleared the communications zone of Panzer Group Guderian to the south. Unhampered by Hitler's stubborn attempt to diffuse the combat strength of Army Group Center about the Russian countryside, and the battle between the Fuhrer and OKH over one decisive objective rather than many indecisive ones. Army Group Center would have entered a period of rest, rehabilitation, and stockpiling on approximately 5 August 1941. Regarding the logistical possibilities for an advance a little over a week later, on 13 August 1941, Army Group Center would receive almost double the number of trains daily it had received a month earher{18} — approximately twenty-four trains rather than fourteen. With time to establish larger stockpiles, and with rail heads advanced to Orsha and Smolensk, Army Group Center obviously had the logistical system to support its advance on Moscow with its entire strength{19}.
14. The additional track would comprise a substantial 15 percent over and above the track constructed among cities. See, for example, the mileages in Gen. d. Eisb. Tr. Aus-schnitte. Stand derStreckenwederherstellung. 1941-1942. U.S. NationalArchives. Records. German Army High Command. Microcopy T-78, Roll 117. Fr. 6041049.
15. Eisenbahntruppen. U.S. National Archives, German Army High Command. Microcopy, T-78. Roll 113, Fr. 6035898. See also Bock. Tagebuchnotizen Osten 1. p. 13.
16. See Halder. Diaries, vol. 6, p. 241.
17. Note the use of the rail system through Orsha. Vitebsk, and Smolensk in the first half of August 1941 in Generalma)or Windisch, Personal Diary of the German 9th Army Supply Officer German Language Copy) (from 1.8.1941-31.1.1942Ë5 February 1954), p. 7. U.S. Army, European Command, Historical Division, MS P-201.
18. See Halder, Diaries, vol. 6, p. 248. in which fourteen trains are noted as available for Army Group Center as of 18 July 1941, and Halder. Diaries, vol. 7. pp. 25. 26, in which twenty-four trains daily are noted as running to supply the center after 7 August 1941.
19. As early as 12 July 1941, the quartermaster general of the German army noted in a telephone call to the chief of staff that Army Group Center had enough supplies to maintain an armored drive to Moscow. He also notes that the infantry had only enough to get to Smolensk. It follows that as early as 12 July, the Germans were close to having logistics under control for a push almost straight through to Moscow. See Halder. Diaries, vol. 6. p. 231.