1122: Concordat of Worms agreed between Pope Calixtus II and Holy Roman Emperor Henry V

1821: Fall of Tripolitsa, Greek forces massacre 30,000 Turks during Greek War of Independence

1862: Otto von Bismarck appointed Prime Minister and Foreign Minister of Prussia by King Wilhelm I

1884: American Herman Hollerith patents his mechanical tabulating machine, the beginning of data processing

1957: President Dwight D. Eisenhower orders US troops to support integration of nine black students at Little Rock Central High School in Arkansas

2018: Indian Prime Minister Narendra Modi launches “Modicare”, free heathcare for 500 million, world’s biggest healthcare program

Source: Onthisday.com