In mid-November 1941 Field Marshal Fedor von Bock's Army Group Center began the final phase of the German assault on Moscow spearheaded by the Third Panzer Army and Fourth Panzer Army. Some 233,000 men, 1,300 tanks, 1,880 guns and 800 aircraft efficiently split Rokossovsky's 16th Army and Leliushenko's 30th Army as the Germans hammered away at a similar number of Russian men and aircraft but far less guns and tanks; the Russian defenders could only put 1,254 guns and 502 tanks into the field.
