Hitler authorizes the plan and sets the beginning date as May 15, 1941. However, it didn't begin until June 22, 1941.
Operation Barbarossa was launched by Hitler in violation of the existing non-aggression treaty with Stalin.
Brest Litovsk falls after a 4 day siege and Army Group North enters Daugavpils
The Germans attacked Leningrad and this period of time was known as the "black months"
300,000 Soviet prisoners, 3,200 tanks, and 3,100 artillery guns are captured by the Germans
The German offensive for the capture of Moscow is ordered.
Stalin proclaims a state of siege in Moscow.
Germans lost the Battle for Moscow, and the invasion had cost the German army over 830,000 casualties in killed, wounded, captured or MIA
Hitler agrees to abandon the Moscow offensive for the winter. Army Group Centre begins to retreat to safer defensive positions.
3700 Leningraders starve to death on Christmas Day, bringing the total for the month to 52,000 and the Supreme Soviet institutes a medal for the defence of Leningrad.