1944 – World War II: The Allied invasion of Normandy—codenamed Operation Overlord—begins with the execution of Operation Neptune (commonly referred to as D-Day), the landing of 155,000 Allied troops on the beaches of Normandy in France. The Allied soldiers quickly break through the Atlantic Wall and push inland in the largest amphibious military operation in history.
1981 – Bihar train disaster: A passenger train travelling between Mansi and Saharsa, India, jumps the tracks at a bridge crossing the Bagmati River. The government places the official death toll at 268 plus another 300 missing; however, it is generally believed that the death toll is closer to 1,000.
1985 – The grave of "Wolfgang Gerhard" is opened in Embu, Brazil; the exhumed remains are later proven to be those of Josef Mengele, Auschwitz's "Angel of Death"; Mengele is thought to have drowned while swimming in February 1979.
1993 – Mongolia holds its first direct presidential elections.