29 significant historical events occurred on August 21. August 21 has seen various important historical events over the years, with five notable occurrences on this date. These events include wartime milestones and scientific developments. In 1942, the Battle of the Tenaru took place during World War II. In 1945, the demon core incident led to fatalities involving plutonium. In 1968, the Warsaw Pact invaded Czechoslovakia. In 2005, the Turkish Grand Prix Formula One race occurred. A total solar eclipse was widely observed across the United States in 2017.
22 famous birthdays on August 21
Including John L. Hall, Mohammed VI of Morocco, Peter Weir
Event Distribution by Century
Darker = Higher Density11th Century
1 event12th Century
1 event13th Century
1 event17th Century
2 events19th Century
6 events20th Century
10 eventsThe kidnapping of Ellen Maria Stone and Katerina Cilko by the Internal Macedonian Revolutionary Organization
Clash between Czechoslovak citizens and soldiers of the Soviet Army during the 1968 Warsaw Pact invasion of Czechoslovakia
21st Century
8 eventsExplore More for August 21
Discover births, deaths, and deeper historical trends for this date.