In technical terms, it wasn't Adolf Hitler's costliest mistake but people say it was Hitler's costliest mistake because that was when Hitler invaded the USSR, this then brought the USSR into World War 2 fully. Hitler made several costly mistakes after Operation Barbarossa, the main one is that he launched case blue and continued the advance into the Soviet Union.
Mainly Adolf Hitler planned Operation Barbarossa but some Generals from the Waffen-SS and Wehrmacht army assisted in Hitler's plans for it.
The city of Brest in Belarus
Barbarossa is the invasion of the Soviet Union. It was a massive undertaking. Initially it was very successful.
Operation Barbarossa can be said to be quite an important battle. This is because, Operation Barbarossa was the codenamed Operation for the German Invasion of the USSR. Hitler was expecting to go from Poland to Moscow within 2 months but this wasn't the case.
the weather closed in on the axis forces earlier than they wanted; they were unprepared and suffered greatly.
Operation Barbarossa
Operation Barbarossa
Mainly Adolf Hitler planned Operation Barbarossa but some Generals from the Waffen-SS and Wehrmacht army assisted in Hitler's plans for it.
Operation Barbarossa
Operation Barbarossa
Operation Barbarossa
22/06/1941.
It refers to Hitler's invasion of the Soviet Union.
Hitler/Stalin .
Operation Barbarossa, June 22, 1941
he was the commander-in-chief of the armed forces.
The city of Brest in Belarus