German troops were not prepared for the cold and by having to wait out winter they also were low on food supplies.
Answer The answer is somewhat more complex than this. Hitler's main tactical mistake was the preoccupation with taking Stalingrad (because it bore Stalin's name) and Moscow (where Stalin was). Taking the oilfields in the south, and securing supply lines would have made victory against the Russians more certain. As an aside, the Russian campaign was delayed for some six weeks because Hitler sent troops to Greece after the Greeks routed the Italian invaders, so the Greek resistance to invasion may have changed the course of the war. The troops sent to Greece were needed for the invasion of Russia, and the delay was critical, with the onset of winter before German objectives (as illogical as they were) were attained.
Usually "Operation Barbarossa", or the German invasion of the Soviet Union, is considered to be Hitler's biggest mistake.
In 1939, Germany and the Soviet Union signed the Non Aggression Pact. This was basically a document that said that neither country would attack the other during wartime. This was broken in 1941 when Hitler and his army invaded the Soviet Union in Operation Barbarossa; this was Hitler's fatal mistake.
onions
it ended with the Soviet Union invading Afghanistan in 1979.
It was B Mussolini wanted to expand his country to challenge the Soviet Union, but Hitler wanted to expand his country to increase trade with the Soviet Union.
Usually "Operation Barbarossa", or the German invasion of the Soviet Union, is considered to be Hitler's biggest mistake.
Attacking Soviet Union
A fear that invasion would provoke the Soviet Union.
In 1939, Germany and the Soviet Union signed the Non Aggression Pact. This was basically a document that said that neither country would attack the other during wartime. This was broken in 1941 when Hitler and his army invaded the Soviet Union in Operation Barbarossa; this was Hitler's fatal mistake.
Not completely defeating Britain before invading the Soviet Union.
Seize Soviet food and oil.
onions
it ended with the Soviet Union invading Afghanistan in 1979.
AfghanistanNOVANET :)
Afghanistan
His intention fired back at him because, although he had a treaty with the Soviet Union, he ignored it and attacked them anyway. So, as a result the Soviet Union joined the Allies to defeat Hitler.
It was B Mussolini wanted to expand his country to challenge the Soviet Union, but Hitler wanted to expand his country to increase trade with the Soviet Union.