Historical Events on September 28

22 significant historical events occurred on September 28. September 28 has seen seven notable historical events in political agreements, elections, and international sports. On this date in 1939, the German–Soviet Treaty of Friendship, Cooperation and Demarcation was signed, setting territorial arrangements between Nazi Germany and the Soviet Union during the early stages of World War II. Additionally, the 1969 West German federal election took place, alongside several Formula One racing events, such as the 1980 Canadian Grand Prix and the 1997 Luxembourg Grand Prix.