On his second voyage across the Atlantic, Columbus and his fleet encountered the mountainous island inhabited by the Taíno people, who called it Borikén. Spanish colonization followed within two decades, devastating the indigenous population through disease, forced labor, and violence, and reshaping the island's demography and culture for centuries.

Born the second son of James VI of Scotland, Charles inherited the English and Scottish thrones in 1625. His insistence on royal prerogative over Parliament's authority, combined with religious tensions, plunged England into civil war. He was tried and executed in 1649 — the only English monarch to be beheaded by his own subjects after a public trial.

Napoleon's fall triggered a broad reordering of European territories at the Congress of Vienna, and among the smaller matters settled was Monaco's status. The tiny principality, annexed by revolutionary France in 1793, had its sovereignty nominally restored under Sardinian protection, setting the stage for its later full independence and its transformation into a glamorous tax haven.

Four and a half months after the bloody battle, President Lincoln spoke for barely two minutes, following a two-hour oration by Edward Everett that no one remembers. His remarks reframed the war not as a fight to preserve a nation but to fulfill an idea — that government of the people, by the people, for the people would not perish from the earth.

Daughter of India's first prime minister, Jawaharlal Nehru, Indira Gandhi grew up steeped in the independence movement and went on to dominate Indian politics for nearly two decades. Her tenure included the 1971 war with Pakistan that led to Bangladesh's creation, the controversial Emergency period of authoritarian rule, and her assassination in 1984 by her own bodyguards.

Hersh's dispatch, distributed by the Dispatch News Service after major outlets initially passed on it, revealed that U.S. soldiers had slaughtered several hundred unarmed Vietnamese villagers, including women and children, in March 1968. The report intensified American disillusionment with the Vietnam War and led to the court-martial of Lieutenant William Calley.

Just four months after Apollo 11, Apollo 12 touched down with remarkable precision, landing within walking distance of the Surveyor 3 probe that had soft-landed there in 1967. Conrad and Bean retrieved pieces of the probe for study and conducted two moonwalks, demonstrating that NASA could now land astronauts with pinpoint accuracy rather than mere success.

Meeting in Paris, leaders from NATO and former Warsaw Pact states, including Mikhail Gorbachev and George H.W. Bush, signed a sweeping declaration affirming democracy, human rights, and market economics as shared European values. The charter symbolically closed the chapter of ideological division that had defined the continent since 1945.