18-Mar-1881 Barnum and Bailey's Greatest Show on Earth opened in Madison Square Garden, in New York City.

18-Mar-1922 Mohandas K. Gandhi was sentenced in India to six years imprisonment for civil disobedience. He was released after two years.

18-Mar-1940 Adolf Hitler and Benito Mussolini held a meeting at the Brenner Pass during which the Italian dictator agreed to join in Germany's war against France and Britain.

18-Mar-1965 The first spacewalk took place as Soviet cosmonaut Aleksei Leonov left his Voskhod Two capsule and remained outside the spacecraft for 20 minutes, secured by a tether.