Very True, The Eastern Front is the forgotten part of the war and brutality of it stuns the imagination.
Lets see...
(Roughly) 28,000,000 men, women, and children killed in the CCCP during WWII, presumably excluding purges, roundups and other crimes against the citizenry by the soviet.
450,000 US KIA
With the German government reporting that its records list 4.3 million dead and missing military personnel. Another 1 million were conscripts from other countries.
28 million military, including the civilian numbers suggest that the entire soviet union military and civilian populations were engaged in the fight and in the support of countering German advances.
Catastrophically stunning.