What are some little-known facts from World War II that fascinate you?

Hello ^_^
Meet again with me, hehe
Last month I share my experience with duolingo. Now I want to share my experience again with english application. This week, I'm trying quora. Maybe you don't know about quora, and you will ask what's quora ?
OK, I will tell you about quora. Quora is a question and answer questions are asked, answered, edited, and organized by its community of users. Quora connects you to everything you to know about. Quora aims to be the easiest place to write new content and share content from the web. I open it wth website and login via gmail, but you can download it on playstore.
First time I open it and I was choose my choice, my timeline full of topics. There have many kind of topics. There's one topic that interest to me, that is "What are some little-known facts from World War II that fascinate you?" a question from Alex Cano. I think it's interesting, because i've been wondering some little facts from World War II.
Richard Muller said her mentor was given the responsibility of measuring the energy of the Hiroshima explosion. He was not in the airplane that carried the bomb, but in a “chase plane” that followed closely. When the bomb was dropped, he threw out an instrument on a small parachute that measured the intensity of the blast and would radio it back to his plane. Then his plane and the more famous Enola Gay (which carried the bomb) made their sharp turns and headed away. A few minutes later (the bomb was dropped on a parachute) the blast wave hit his device and radioed the information to him. Soon afterwards the blast wave hit the Alvarez plane, but it was much weaker because they had flown quite far by the time the bomb exploded and destroyed the city and people of Hiroshima.
According to Russel Anderson statement, he said Simo Häyhä, born 1905, was a Finnish sniper who fought against the Red Army during the Winter War of 1939–40. He is credited with 505 kills, the most kills of any sniper in history, despite never using a scope. He told about a snipper in World War II.
And still more discussed in there , like the characters in the World War II also. So, many facts about this war that we have to figure it out.