Historical Events on December 5

11 significant historical events occurred on December 5. December 5 marks notable events in military history and international diplomacy. In 1945, Flight 19, a U.S. Navy training squadron of five TBF Avenger aircraft, vanished during a routine mission over the Atlantic Ocean, becoming a famous unsolved aviation mystery. Almost fifty years later, in 1994, the Budapest Memorandum was signed. This agreement involved Ukraine, the United States, Russia, and the United Kingdom, focusing on nuclear security assurances.