In two weeks of fighting, lacking sufficient fuel and ammunition, the Germans slowly crept towards Moscow. In the south, the 2nd Panzer Group was being blocked. On 22 November, Soviet Siberian units, augmented by the 49th and 50th Soviet Armies, attacked the 2nd Panzer Group and inflicted a defeat on the Germans. The 4th Panzer Group pushed the Soviet 16th Army back, however, and succeeded in crossing the Moscow Canal in an attempt to encircle Moscow. On 2 December, part of the 258th Infantry Division advanced to within of Moscow. They were so close that German officers claimed they could see the spires of the Kremlin, but by then the first blizzards had begun. A reconnaissance battalion managed to reach the town of Khimki, only about from the Soviet capital. It captured the bridge over the Moscow-Volga Canal as well as the railway station, which marked the easternmost advance of German forces. In spite of the progress made, the Wehrmacht was not equipped for such severe winter warfare. The Soviet army was better adapted to fighting in winter conditions, but faced production shortages of winter clothing. The German forces fared worse, with deep snow further hindering equipment and mobility. Weather conditions had largely grounded the Luftwaffe, preventing large-scale air operations. Newly created Soviet units near Moscow now numbered over 500,000 men, and on 5 December, they launched a massive counterattack as part of the Soviet winter counteroffensive. The offensive halted on 7 January 1942, after having pushed the German armies back 100–250 km (62–155 mi) from Moscow. The Wehrmacht had lost the Battle for Moscow, and the invasion had cost the German Army over 830,000 men. With the failure of the Battle of Moscow, all German plans for a quick defeat of the Soviet Union had to be revised. The Soviet counter-offensives in December 1941 caused heavy casualties on both sides, but ultimately eliminated the German threat to Moscow. Attempting to explain matters, Hitler issued Directive N. 39, which cited the early onset of winter and the severe cold as the reason for the German failure, whereas the main reason was the German military unpreparedness for such a giant enterprise. On 22 June 1941, the Wehrmacht as a whole had 209 divisions at its disposal, 163 of which were offensively capable. On 31 March 1942, less than one year after the invasion of the Soviet Union, the Wehrmacht was reduced to fielding 58 offensively capable divisions.