On December 8, 1974, a plebiscite finalized the abolition of the monarchy in Greece. The last Greek king, Constantine II, had ceased any royal pretensions while in exile on June 1. The December referendum was something of a formality.
On December 7, 1972, Apollo 17 launched, the last of the Apollo Moon missions. Later that day, one of the astronauts — either Ron Evans or Harrison Schmitt — snapped the photo that would later become famous as “The Blue Marble.”
On December 6, 1865, the Thirteenth Amendment to the United States Constitution was ratified, banning slavery in all states and territories.
One-hundred-and-nineteen years later, to the day, in 1984, Paul Jacob (of ThisIsCommonSense.org, LibertyiFund.org, and the Citizens in Charge Foundation) was arrested by the FBI for his refusal to register with Selective Service System (the draft people). The Government was probably not attempting to make a commemorative point about involuntary servitude.
On December 5, 1933, nationwide alcohol Prohibition in the United States ended after Utah became the 36th U.S. state to ratify the 21st Amendment to the United States Constitution, thus establishing the required 75 percent of states needed to enact the amendment that overturned the 18th.
On December 4, 1783, at Fraunces Tavern in New York City, General George Washington formally bade his officers farewell.
On December 3, 1989, the leaders of the two world superpowers, the United States of America and the Union of Soviet Socialist Republics, declared an end to the Cold War, at a summit in Malta. A little over two years later not only had the Cold War ended, the Soviet Union was itself dissolved.