The battles on the eastern front contained the largest military confrontation in history. It was central to the Holocaust, it was the site of nearly all extermination camps, death marches, ghettos and pogroms. 30 million out of the 70 million deaths from WWII occurred on the eastern front. The two main powers of the eastern front were Nazi Germany and the Soviet Union along with their allies. Both powers disliked the outcome of WWI.
After WWII, German soldiers said that they had nothing to do with the horrors that the Nazi's did. However, Sonke Nietzer discovered transcripts of recorded conversations from Germany officers talking about their experiences. The recording were made from Allies to listen to conversations between German prisoners of war in their cells. Nietzer and social physchologist Harald Welzer ended up finding 150,000 pages of transcripts. All the information ended up in a book called "Soldaten" ("Soldiers").
There was also a brutal mass rape of German women during and after the war. Victims were repeatedly raped. An estimated 2,000,000 women and girls were believed to be raped by the end of WWII by Red Army Soldiers. If they ended up pregnant, they couldn't abort and had to follow along with an unwanted child as a humiliation. 90% of raped women in Berlin had diseases.
Who were the two main powers of the eastern front?
Why do you think women were being raped at the time of war?