Historical Events on October 27

15 significant historical events occurred on October 27. October 27 has been a day of notable military, political, and sporting events over the centuries. On this date in 1938, the Battle of Wuhan, one of the largest battles in the Second Sino-Japanese War, ended. In 2017, the Catalan Republic was declared, though it was short-lived. This date has also been the day of significant Formula One races, such as the Mexican Grand Prix in both 1963 and 2019.