On April 26

The International Hydrographic Organization abandoned South Korean-led 'attempts to rename the Sea of Japan.

Controversy surrounding the relocation of the Bronze Soldier of Tallinn, a Soviet Red Army World War II memorial in Tallinn, Estonia, erupted into mass protests and riots.

Just before landing at Nagoya Airport, Japan, the copilot of China Airlines Flight 140 inadvertently triggered the takeoff/go-around switch, causing the aircraft to crash and killing 264 of the 271 people on board.

A tornado struck the Manikganj District of Bangladesh and killed an estimated 1,300 people, making it the deadliest tornado in history.

An editorial was published in the People's Daily denouncing the growing unrest in Tiananmen Square in Beijing which would remain contentious through the remainder of the protests.

The World Intellectual Property Organization (WIPO) came into being when the WIPO Convention entered into force.

Service ended on the Baltimore and Ohio Railroad's Royal Blue Line, one of the first major electrified train lines in the U.S. (steam train pictured).

World War II: U.S. Navy submarines began attacks on Japan's Take Ichi convoy as it sailed in waters between Taiwan and the Philippines, eventually sinking four vessels and killing more than 4,000 troops.

Boris Kidrič and Edvard Kardelj founded the Liberation Front of the Slovene Nation, the main anti-fascist Slovene civil-resistance and political organization during World War II.

The Gestapo, the official secret police force of Nazi Germany, was established.

First World War: Britain, France and Russia signed a secret treaty promising territory to Italy if it joined the war on their side.

U.S. Army soldiers cornered and fatally shot John Wilkes Booth, the assassin of U.S. president Abraham Lincoln, ending a twelve-day manhunt.

In a conspiracy to replace the Medici family as rulers of the Republic of Florence, the Pazzi family attacked Lorenzo de' Medici (pictured) and killed his brother Giuliano at Florence Cathedral.