On March 15, 44 B.C., Roman dictator Julius Caesar was assassinated by a group of nobles that included Brutus and Cassius.

In 1493, Italian explorer Christopher Columbus returned to the Spanish harbor of Palos de la Frontera, two months after concluding his first voyage to the Western Hemisphere.

In 1820, Maine became the 23rd state.

In 1913, President Woodrow Wilson met with about 100 reporters for the first formal presidential news conference.

In 1956, the Lerner and Loewe musical play “My Fair Lady,” based on Bernard Shaw’s “Pygmalion,” opened on Broadway.

In 1965, President Lyndon B. Johnson called for new legislation to guarantee every American’s right to vote, resulting in the Voting Rights Act of 1965.