Why is 1941 called both tragic and heroic in the history of the Great Patriotic War?

This year was the worst for the USSR and for the Soviet army. Then the Germans, with a swift blow, were able to sweep and crush entire armies that stood in their way, and they were also able to occupy vast territories. Thus, the Red Army suffered huge losses, millions of killed soldiers and millions of prisoners. On the other hand, Soviet soldiers fiercely fought against the Nazis, not sparing their lives.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.