President Woodrow Wilson learns of the Zimmermann Telegram, a message from Germany to Mexico proposing an alliance in the event of a war with the United States.
The Soviet Union announces its complete retreat from Afghanistan after more than nine years of military intervention.
The Maastricht Treaty is signed, creating the European Union and leading to currency union for many EU states.
A mortar bomb goes off in Sarajevo's main market square, killing sixty-eight people and wounding two-hundred.