What happened on 1 July?

23 events from the Ever-When timeline, ranked by how much they mattered.

1. 1916 Battle of the Somme British and French offensive on the Western Front; 60,000 British casualties on the first day; 420,000 British by November.
2. 1944 Bretton Woods conference Allied negotiators design the postwar monetary order and create the IMF and World Bank.
3. 1863 Battle of Gettysburg Three-day battle in Pennsylvania — turning point of the Civil War.
4. 1646 Born: Gottfried Wilhelm Leibniz German polymath; co-invented calculus with Newton; wrote Monadology, Theodicy, Discourse on Metaphysics; foundational rationalist philosopher.
5. 1867 Canadian Confederation British North America Act unites colonies into the Dominion of Canada.
6. 1997 Hong Kong returned to China British sovereignty over Hong Kong ends after 156 years.
7. 1690 Battle of the Boyne William III defeats James II's Catholic Irish-French army in Ireland; consolidates Protestant ascendancy.
8. 1569 Union of Lublin Poland and Lithuania merge into a single Commonwealth with an elective king and common parliament — the constitutional experiment that dominated eastern Europe for two centuries.
9. 1798 Napoleon's Egyptian Campaign Bonaparte's expedition reaches Egypt but is cut off by Nelson's destruction of his fleet at the Nile.
10. 1913 Bohr's atomic model Bohr's quantised model of the atom explains hydrogen spectral lines, ushering in quantum theory.
11. 69 The East proclaims Vespasian The legions of Egypt, Judaea and Syria hail the general suppressing the Jewish revolt — a mule-breeder's son with two grown sons of his own, the first emperor with no drop of arist
12. 2020 Tesla becomes most valuable carmaker Tesla's market cap eclipses Toyota.
13. 1961 Born: Diana, Princess of Wales First wife of Prince Charles; humanitarian icon whose death convulsed Britain.
14. 1991 The Warsaw Pact dissolves itself In Prague — where its tanks crushed the Spring in 1968 — the Warsaw Pact's members sign it out of existence in under an hour. The Cold War's eastern alliance ends not in battle but
15. 1903 Tour de France first edition First Tour de France cycling race.
16. 1911 Second Moroccan Crisis (Agadir) German gunboat at Agadir, demanding French concessions; sharpens Anglo-German tensions.
17. 1946 Bikini Atoll nuclear tests U.S. tests at Bikini and Enewetak displace Marshallese communities and pollute the Pacific.
18. 2007 UK ban on smoking in public places Smoking prohibited in enclosed public spaces in England from July 2007; Scotland 2006, Wales/NI 2007.
19. 1097 Battle of Dorylaeum Kilij Arslan's horse-archers catch Bohemond's column alone on the Anatolian plateau and nearly destroy it — until the second crusader army arrives on the Turkish flank at the criti
20. 1979 Sony Walkman launched Sony's portable cassette player makes music personal and mobile, a landmark of consumer culture.
21. 1147 Capture of Lisbon Crusader fleet bound for the Levant detours to help Afonso I of Portugal take Lisbon; a rare Second Crusade success.
22. 1969 Investiture of Charles as Prince of Wales Prince Charles is formally invested as Prince of Wales at Caernarfon Castle in a televised ceremony, amid protest from Welsh nationalists.
23. 2000 Øresund Bridge opens Road and rail finally join Copenhagen to Malmö across the strait the Vikings sailed — Scandinavia's two halves fused into one region.