Episode description
https://www.history.com/topics/world-war-ii/d-day
https://en.wikipedia.org/wiki/Normandy_landings
https://www.army.mil/d-day/history.html
https://www.iwm.org.uk/history/the-10-things-you-need-to-know-about-d-day
https://www.dday.org/overview/
https://www.britannica.com/event/Normandy-Invasion
https://www.nationalww2museum.org/war/articles/d-day-allies-invade-europe