On March 24

The co-pilot of Germanwings Flight 9525 deliberately crashed the aircraft, an Airbus A320, in a mass murder–suicide in the French Alps, killing all 150 people on board.

Led by Jigme Thinley, the Bhutan Peace and Prosperity Party won 45 of 47 seats in the country's first National Assembly election.

Hannah Montana, starring Miley Cyrus as an actress whose alter ego is the titular character, premiered.

One day after making a plea to Salvadoran soldiers to stop carrying out the government's repression, Archbishop Óscar Romero was assassinated while celebrating Mass in San Salvador.

Royal assent was given to Prince Edward Island's Provincial Flag Act, which outlined the design of its provincial flag.

Members of the German National Movement in Liechtenstein attempted to overthrow the government and provoke Liechtenstein's annexation into Nazi Germany.

The Tydings–McDuffie Act came into effect, which provided for self-government of the Philippines and for Filipino independence from the United States after a period of ten years.

Irish War of Independence: In Belfast, two men wearing police uniforms broke into a house and murdered a Catholic family in what was believed to be a reprisal for the deaths of two policemen the day before.

The inaugural Women's Olympiad (cover pictured), the first international women's sports event, opened at the International Sporting Club of Monaco in Monte Carlo.

Robert Anderson Van Wyck, mayor of New York City, broke ground for a new underground Rapid Transit Railroad that would link Manhattan and Brooklyn.

The Winton Motor Carriage Company (ad pictured), one of the first American car companies, sold its first unit.

German physician Robert Koch announced the discovery of Mycobacterium tuberculosis, the pathogen that causes tuberculosis.

Japanese chief minister Ii Naosuke was assassinated by rōnin samurai upset with his role in opening Japan to foreign powers.

James VI of Scotland succeeded to the thrones of England and Ireland as James I, uniting the realms under a single monarch.

Hundred Years' War: An English fleet led by Richard Fitzalan attacked 250 to 360 French, Flemish and Castilian vessels in the Battle of Margate.