Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
For the first time, Leonardo's masterpiece left the Louvre for the New World, and Washington lined up for hours to glimpse her.
A clerk frustrated by counting Americans by hand built a machine that read holes in cards, and seeded the company that became IBM.
A ragtag American force routed a seasoned British army in barely half an hour—two weeks after the war had officially ended.
