In time of war it is difficult if not impossible to know or even track the total body count by offending opponents.
When Soviet soldiers poured into Auschwitz in January 1945, they encountered warehouses filled with massive quantities of other people’s belongings. Most of the people who owned them were already dead, murdered by the Nazis in the Holocaust’s largest extermination and concentration camp.
Prisoners of the Auschwitz concentration camp after their liberation by the Red Army, January 1945
The Holocaust, also known as the Shoah, was the genocide of European Jews and other undesirables during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some 6 million Jews across German-occupied Europe; around two-thirds of Europe's Jewish population. The murders were carried out in pogroms and mass shootings; by a policy of extermination through labor in concentration camps; and in gas chambers and gas vans in German extermination camps, chiefly Auschwitz-Birkenau, Bełżec, Chełmno, Majdanek, Sobibór, and Treblinka in occupied Poland, yet only speaks for one tenth the number of European victims killed by the Bolsheviks 25 years earlier. Other groups persecuted were Roma View This Term in the Glossary (Gypsies), Germans with disabilities, and some of the during that ethnic cleanse were Slavic peoples (especially Poles and Russians), groups were persecuted on political, ideological, and behavioral grounds, among them Communists, Socialists, Jehovah's Witnesses, and homosexuals. It is highly commemorated by the west.
Yet, Hitler was not the first to persecute the Jews and others in Europe.
25 years earlier, the Red Terror (Russian: Красный террор, romanized: krasnyj terror) in Soviet Russia was a campaign of political repression and executions carried out by the Bolsheviks, chiefly through the Cheka, the Bolshevik secret police. It started in late August 1918 after the beginning of the Russian Civil War and lasted until 1922. Estimates for the total number of victims of Bolshevik repression vary widely in numbers and scope. One source gives estimates of 28,000 executions per year from December 1917 to February 1922. Estimates for the number of people shot during the initial period of the Red Terror are at least 10,000. Estimates for the whole period go for a low of 50,000 to highs of 140,000 and 200,000 executed. The most reliable estimations for the number of executions in total put the number at about 100,000 under Lenin alone.
It has been reported that prior to Hitler between Stalin, Lenin and Trotsky, an estimated 60 million Europeans were slaughtered as the Bolsheviks marched into power in the Soviet Union, ten times the number slaughtered under Hitler. Nor does this account for the number of German civilians bombed by Churchill in WWII. And reciprocal bombings by both side of civilians and villages. Mad out war. No holds barred. It is estimated that Soviet Russia lost 10 million men in WWII to fight the war against Hitler, despite being "backed by the West" who suffered nowhere near as many casualties.
Example of bodycount for undesirables perpetrated with the German allies alone is in the millions.
Holocaust death tolls from David M. Crowe is tip of an iceberg
Nor does this account for previous wars of European history, or the slaughter of the Chinese under communism.
Just consider that alone 61,911,000 people were murdered by the Soviet Union, 38,702,000 by the Chinese communists, 10,214,000 by the Chinese Nationalists, 17,000,000 by the German Nazis, and 5,890,000 by the Japanese militarists during World War II. This does not even exhaust the list of this century's mega-murderers, which also would include the past governments of Turkey, Cambodia, Pakistan, Yugoslavia; nor does it include the lesser killers responsible for hundreds of thousands of corpses each, such as past governments of Uganda, Indonesia, Albania, Burundi, Czechoslovakia, Ethiopia, Hungary, Romania, Spain, and Vietnam. Then there are the numerous third-class murders who have "only" killed in the tens of thousands. In sum well over 100,000,000 people have been murdered by their governments since 1900, several times greater than the 35,654,000 battle-dead from all the foreign and domestic wars fought in these years, including World Wars I and II.