O.J. Simpson became the first NFL running back to rush for 2,000 yards in a season.
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German armies took Allied forces by surprise in the Ardennes, marking the beginning of the Battle of the Bulge.
The Anglo-Irish Treaty, agreed to by the British Parliament and Sinn Féin, was ratified.
The Pioneer 6 space probe was launched atop a Delta-E rocket.
Vasco da Gama became the first European to sail along Africa's East Coast.
The Boston Tea Party protest occurred.
