The concentration camps were not only filled with six million Jewish people.
The German army kidnapped thousands of Polish children and forcibly 'Germanised' them.
In March 1933, immediately after Hitler's ascension as the German Chancellor, the first Jewish concentration camp was built. The Nazi Party was given control over the German police force.
Hitler was so obsessed with German racial supremacy, he ordered to preserve the Jewish quarter of Prague in Austria to establish an "exotic museum of an extinct race".
In 1920, the number of members in the Nazi Party was 20. By 1945, the number rose to 8.5 million.
The longest siege in the history of the Soviet Army took place during the Afghan war and became known as "the Rukha standoff".
In 1946, the Red Army changed its official name to the Soviet Army.
The Red Army was most numerous (11,365,000 soldiers) in early 1945.
There were no officers in the Red Army until 1943.
It is hard to believe but certain regiments in the Red Army once wore a swastika.