Answer: I would say through journalism as it was a new thing in that time.
Explanation:
By summer 1941, British intelligence agents were listening in on classified German radio transmissions that described systematic mass murders in Lithuania, Latvia, and later Ukraine. News also came from the Soviets. On August 14, 1941, British Prime Minister Winston Churchill summarized the news in a broadcast to the public.
At the wars near end. There were stories told by Jews who escaped of unspeakable horrors. At first the Allies did not believe them. Still, when the US Army liberated Buchenwald. They saw Musselmanns people that have been starved to near death, like literal walking skeletons. Soon pictures started to come in, the evidence was unmistakable, these people were going to be exterminated by the SS-Totenkopfverband. There was too much evidence to hide.
https://www.usatoday.com/story/news/nation-now/2018/02/08/column-why-america-cant-get-over-slavery-its-greatest-shame/1000524001/ check this site out it has some pretty good reasons you can use
The United Nations (the UN) was established in 1945, the same year the Second World War ended. This organization was created in the hopes of averting such another massive war.
