Mongol invasions of Vietnam: Yuan forces are defeated by Tr?n forces in the Battle of Bach Dang in present-day northern Vietnam.

Harvard University votes to establish the Harvard Business School.

A fire breaks out on the passenger ferry Scandinavian Star, killing 159 people.

The first Tony Awards are presented for theatrical achievement.

In China, the April Fifth Movement leads to the Tiananmen Incident.

The first model of the new Saab Viggen fighter aircraft is unveiled.

YouTube headquarters shooting. On April 3, 2018, a tragic shooting unfolded at YouTube’s headquarters in San Bruno, California. The assailant, 38-year-old Nasim Najafi Aghdam, entered…

Gunmen attack Garissa University College in Kenya, killing at least 148 people and wounding 79 others.

Adolf Hitler is sentenced to five years imprisonment for his participation in the “Beer Hall Putsch” but spends only nine months in jail. He is…