After Philip II was assassinated at his daughter's wedding, twenty-year-old Alexander acted decisively, executing potential rival claimants and winning the army's loyalty before consolidating control over Macedon and its Greek allies. This ruthless securing of power set the stage for the campaigns that would carry him to Persia, Egypt, and India within little more than a decade.
In a ceremony at the Cabildo in New Orleans, French colonial prefect Pierre Clément de Laussat handed over control of Louisiana to American commissioners William Claiborne and James Wilkinson. The transfer completed a deal Napoleon Bonaparte had struck to fund his European wars, adding roughly 828,000 square miles to the United States at less than three cents an acre.
Samuel Morse, a portrait painter turned inventor, submitted formal documentation asserting his claim to the electric telegraph and the dot-and-dash code that would eventually bear his name. The filing came amid a competitive scramble among inventors racing to perfect electrical signaling, years before Morse's famous 1844 public demonstration between Washington and Baltimore.
At the National Reactor Testing Station, scientists led by physicist Walter Zinn used the Experimental Breeder Reactor I to produce enough electricity to power four light bulbs, the first time atomic energy had been converted into usable electric power anywhere in the world. The modest demonstration foreshadowed the rapid, controversial expansion of nuclear power plants across the globe in the following decades.
Delegates gathered in Tây Ninh province to establish the National Front for the Liberation of South Vietnam, uniting communists, nationalists, and other opponents of the Diem government under one umbrella organization. Backed by North Vietnam, the NLF became the political face of the insurgency that Americans would call the Viet Cong, fighting a guerrilla war that lasted fifteen years and drew the United States into its longest conflict of the 20th century.
Following the October plebiscite in which 56% of Chileans voted against extending his rule, the certification process cleared the way for Pinochet's eventual departure from power in 1990. The vote, monitored internationally, ended nearly fifteen years of military dictatorship marked by disappearances, torture, and exile of political opponents.
US President George H. W. Bush ordered the invasion following escalating tensions with strongman Manuel Noriega, citing drug trafficking charges, threats to American citizens, and the deaths of US military personnel. Noriega evaded capture initially by taking refuge in the Vatican's Panama embassy before surrendering weeks later.
At a midnight ceremony, Portuguese and Chinese officials lowered the Portuguese flag and raised China's, transferring the tiny peninsula under a 'one country, two systems' framework similar to Hong Kong's 1997 handover. Macau became a Special Administrative Region, preserving its own currency, laws, and government for at least fifty years.