December 7

Roman statesman Marcus Tullius Cicero is assassinated in Formia on the orders of Marcus Antonius.

Cicero's assassination was ordered by Mark Antony in retaliation for the statesman's scathing public speeches denouncing him, delivered after Julius Caesar's assassination as Cicero attempted to defend the Roman Republic against Antony's growing power. His severed head and hands were displayed in the Roman Forum, a brutal warning against future political opposition that nonetheless failed to prevent the republic's collapse.

The Great Storm devastates southern Britain with winds exceeding 120 mph, killing an estimated 9,000 people.

The Great Storm of 1703 remains one of the most violent windstorms ever recorded in British history, destroying thousands of homes, sinking hundreds of ships, and even damaging the roof of Westminster Abbey. Daniel Defoe, who later wrote Robinson Crusoe, published a detailed account of the disaster titled "The Storm," considered one of the earliest examples of modern journalism.

Delaware becomes the first state to ratify the U.S. Constitution.

Delaware's rapid unanimous ratification of the Constitution, achieved without significant debate, earned it the enduring nickname "The First State." The small state's quick action reflected its economic dependence on ratification by larger neighboring states and helped build early momentum toward the nine-state threshold needed for the Constitution to take effect.

The United States declares war against Austria-Hungary during World War I.

The U.S. declaration of war against Austria-Hungary came several months after America's initial entry into World War I against Germany, reflecting the more limited direct conflict between American and Austro-Hungarian forces. The declaration formally aligned the United States against all the Central Powers, though American troops saw comparatively little direct combat against Austro-Hungarian forces specifically.

The Imperial Japanese Navy launches a surprise attack on the U.S. Pacific Fleet at Pearl Harbor, Hawaii.

The surprise attack on Pearl Harbor, launched without a prior declaration of war, destroyed or damaged numerous American battleships and killed over 2,400 people in under two hours. President Roosevelt's request for a declaration of war the following day, describing the date as one that would "live in infamy," brought the United States fully into World War II.

Apollo 17 launches as NASA's final crewed lunar mission, its crew capturing the iconic "Blue Marble" photograph of Earth.

Apollo 17's overnight launch, the only nighttime liftoff of the Apollo program, illuminated the Florida sky and was visible for hundreds of miles. During the mission, astronaut Harrison Schmitt, the first professional geologist to visit the Moon, and commander Eugene Cernan collected the largest sample of lunar material returned by any Apollo mission.

Charles Brooks Jr. becomes the first person executed by lethal injection in the United States.

Charles Brooks Jr.'s execution by lethal injection introduced a method that Texas had adopted as a purportedly more humane alternative to the electric chair and gas chamber. Lethal injection subsequently became the predominant execution method used across the United States, though it has faced ongoing legal and ethical challenges regarding drug sourcing and potential suffering.

A devastating 6.8 magnitude earthquake strikes Armenia, killing between 25,000 and 50,000 people.

The Spitak earthquake struck northern Armenia with such force that it leveled entire towns built with substandard Soviet-era construction, exposing serious deficiencies in building codes across the region. The disaster prompted an unprecedented opening of Soviet borders to international humanitarian aid, a significant departure from the USSR's typically closed approach to foreign assistance.

NASA's Galileo spacecraft arrives at Jupiter after a six-year journey.

Galileo's arrival at Jupiter marked the beginning of an eight-year mission that would dramatically expand scientific understanding of the gas giant and its moons, including strong evidence for a subsurface ocean on Europa that could potentially harbor life. The spacecraft also released an atmospheric probe that provided the first direct measurements of Jupiter's dense atmosphere.

Japan's Akatsuki probe successfully enters orbit around Venus after an initial failed attempt five years earlier.

Japan's Akatsuki probe had failed its initial orbital insertion attempt at Venus in 2010 due to an engine malfunction, forcing it to spend five additional years orbiting the sun before mission controllers successfully maneuvered it into Venus orbit using its smaller attitude control thrusters. The eventual success made it the first Japanese spacecraft to successfully orbit another planet.