1921

The Women’s Olympiad, the first international women’s sporting event, began in Monte Carlo, Monaco.

1989

The supertanker Exxon Valdez ran aground on a reef in Alaska’s Prince William Sound and began leaking an estimated 11 million gallons of crude oil.

1999

NATO launched airstrikes against Yugoslavia, marking the first time in its 50-year existence that it attacked a sovereign country.

2016

A U.N. war crimes court convicted former Bosnian Serb leader Radovan Karadžic of genocide and nine other charges for orchestrating a campaign of terror that left 100,000 dead.