Historical Events on October 21

24 significant historical events occurred on October 21. October 21 has seen various historical events, including military conflicts, industrial tragedies, and sports milestones. On this date, the Battle of Trafalgar occurred in 1805 during the Napoleonic Wars, and the tragic Aberfan disaster happened in Wales in 1966. There were also several Formula One races in the 1980s and 1990s. This date marks both major naval victories and significant civilian tragedies.