June 30 in History

The Continental Congress adopted the Articles of War on June 30, 1775, establishing the first unified military legal code for the Continental Army. The articles were closely modeled on the British Articles of War, reflecting the colonists' military traditions even as they fought to separate from Britain. The code covered discipline, desertion, mutiny, treatment of prisoners, and the authority of courts-martial. George Washington, who had been appointed commander-in-chief just two weeks earlier, desperately needed these regulations to impose order on the undisciplined militia forces assembling around Boston. The articles were revised in 1776 and again in 1806. They remained the foundation of American military justice until replaced by the Uniform Code of Military Justice in 1951.

Albert Einstein submitted his paper "On the Electrodynamics of Moving Bodies" to the journal Annalen der Physik on June 30, 1905, introducing the special theory of relativity. The 26-year-old patent clerk in Bern proposed two revolutionary postulates: the laws of physics are the same in all inertial reference frames, and the speed of light in a vacuum is constant regardless of the motion of the observer. The consequences were staggering: time slows down at high speeds, distances contract, mass increases, and simultaneity is relative. Einstein followed up three months later with a three-page paper deriving E=mc^2, showing that mass and energy are interchangeable. The 1905 "miracle year" also included papers on the photoelectric effect (which won him the Nobel Prize) and Brownian motion. He was working at the patent office because no university would hire him.

Adolf Hitler ordered the purge of the SA (Sturmabteilung) leadership on June 30, 1934, in what became known as the Night of the Long Knives. SS squads arrested and executed SA chief Ernst Rohm and at least 85 other people over three days, though the actual death toll may have been several hundred. Rohm's SA, with three million members, had become a threat to the regular army and to Hitler's own power. The purge also targeted political enemies unrelated to the SA, including former Chancellor Kurt von Schleicher and Gregor Strasser, a rival within the Nazi Party. The army officer corps, relieved to see the SA neutralized, swore a personal oath of loyalty to Hitler on August 2. Vice President Franz von Papen, whose staff was arrested during the purge, was sent as ambassador to Vienna and never challenged Hitler again.

Ohio became the 38th state to ratify the 26th Amendment on June 30, 1971, lowering the voting age from 21 to 18 and making it the fastest amendment ever ratified, taking just 100 days from congressional passage to ratification. The amendment was driven by the argument that young men old enough to be drafted and sent to fight in Vietnam (the draft age was 18) should be old enough to vote. The slogan "Old enough to fight, old enough to vote" had been used since World War II, but the Vietnam War's unpopularity among young people gave it irresistible political force. The amendment added approximately 11 million new voters to the electorate. Voter turnout among 18-20-year-olds was 55% in the 1972 presidential election but has generally declined since, averaging around 45% in recent elections.

Britain established the world's first telephone-based emergency service on June 30, 1937, after a coroner's inquiry into a fatal house fire revealed that a neighbor had tried to call the fire brigade but was held in a telephone exchange queue while the building burned. The 999 number was chosen because it could be dialed quickly in the dark (the "9" hole was at the bottom of the rotary dial, with a physical stop next to it). The service initially covered only the London telephone exchange area. When someone dialed 999, an automated buzzer and flashing light alerted the operator. The system went nationwide in 1976. The 999 model inspired similar services worldwide, including the US 911 system (established 1968) and the European 112 number (established 1991).

Spanish forces under the Duke of Alba routed a Franco-Navarrese army at the Battle of Noain on June 30, 1521, ending the last serious attempt to restore the independent Kingdom of Navarre south of the Pyrenees. The French had invaded Navarre to restore the deposed House of Albret to the throne, occupying Pamplona and much of the kingdom. The Spanish counterattack at Noain was decisive: approximately 6,000 Franco-Navarrese troops were killed or captured. A young Inigo Lopez de Loyola (later St. Ignatius of Loyola) was wounded by a cannonball during the siege of Pamplona that preceded the battle; his spiritual conversion during recovery led him to found the Society of Jesus (Jesuits) in 1540. The battle permanently incorporated Lower Navarre into the Spanish Crown and completed the territorial unification of modern Spain.