First Squad: The Moment of Truth

Set during the opening days of World War II on the Eastern Front. Its main cast are a group of Soviet teenagers with extraordinary abilities; the teenagers have been drafted to form a special unit to fight the invading German army. They are opposed by a Schutzstaffel (SS) officer who is attempting to raise from the dead a supernatural army of crusaders from the 12th-century Order of the Sacred Cross and enlist them in the Nazi cause. Pretty soon all the teenagers die, except for the protagonist Nadia. She is taken to a secret Soviet lab that studies supernatural phenomena, especially contacts with the dead. Nadia’s task is to dive into the world of the dead for reconnaissance. There, in the Gloomy Valley, she meets her dead friends and tries to persuade them to continue fighting.

The animation is interspersed with mockumentary “present day” sequences, where Soviet and German war veterans, a historian and a psychologist comment real historical events and the events of the plot as if they were historical. —Wikipedia