dropping these links to counter the narrative promoted there were fewer than 1 million killed. it's important to distinguish between those shot, starved to death, gassed and killed through dangerous physical labor camps.

might be a difficult read for some, I find it much better to be informed by active research than lazy forum reading. YMMV

https://en.wikipedia.org/wiki/Holocaust_victims https://en.wikipedia.org/wiki/The_Holocaust https://encyclopedia.ushmm.org/content/en/article/documenting-numbers-of-victims-of-the-holocaust-and-nazi-persecution

https://advances.sciencemag.org/content/5/1/eaau7292

https://encyclopedia.ushmm.org/content/en/article/tattoos-and-numbers-the-system-of-identifying-prisoners-at-auschwitz

https://en.wikipedia.org/wiki/Identification_of_inmates_in_German_concentration_camps