The Fall of Moscow was a symbolic and tactical battle for Third Reich. Stalin demanded all to shed blood in its final defence: the young, weak and old were sent to support shock troops of the Red Army.
The German capture of Stalingrad and Leningrad now marked the beginning of the invasion of Moscow, by reinforced German armies. Moscow itself had little forces stationed there, as most troops died fighting to preserve its outercity defences. Therefore Stalin demanded men, women, and the mentally ill to fight for the Soviet Union in a last bid to hold the German advance.
German panzer divisions were the first to be sent in, launching attacks on civilian targets.