The name “Euro” was officially adopted for European Currency.
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The Anglo-Irish Treaty, agreed to by the British Parliament and Sinn Féin, was ratified.
The Great White Fleet began its worldwide navigation.
German armies took Allied forces by surprise in the Ardennes, marking the beginning of the Battle of the Bulge.
The mayor of Flint, Michigan, declared a state of emergency over contaminated water.
A five-day pollution red alert was declared in Beijing and 21 other Chinese cities.
