March 1 in History

President John Tyler signed the bill annexing the Republic of Texas, instantly transforming the nation's southern border and setting the stage for the Mexican-American War. This decisive move expanded U.S. territory by nearly one million square miles while inflaming sectional tensions over slavery that would eventually tear the country apart.

The first military parade in Roman history was thrown by a man who'd just won a war caused by kidnapping his neighbors' daughters. Romulus needed wives for his new city — Rome had plenty of male refugees but no women — so he invited the nearby Sabines to a festival and had his men grab their unmarried girls. The Sabine men came back armed. After Romulus defeated the Caeninenses, he marched through Rome carrying the enemy king's armor on a wooden frame, establishing the *triumphus* ceremony that would define Roman military culture for a thousand years. Every future conqueror from Caesar to Constantine would parade captives and treasure through those same streets, all copying a ritual that started with mass abduction.

Publicola earned his nickname—"friend of the people"—by tearing down his own house. After defeating Rome's last king at Silva Arsia, the consul faced a different problem: Romans suspected he wanted the throne himself because his mansion sat atop the Velian Hill, literally looking down on the Forum. So he demolished it overnight. His triumph through Rome's streets in 509 BC wasn't just the Republic's first victory parade—it was political theater, proving a commander could wield absolute power on the battlefield, then surrender it completely at the city gates. Every victorious general for the next 500 years would follow this script, until Julius Caesar didn't.

Sulla's soldiers were so starving they'd resorted to boiling leather belts and shoes, but the Athenians had it worse — they were eating grass from the city walls. After five months of siege, Lucius Cornelius Sulla finally breached Athens on March 1, 86 BC, and what followed wasn't liberation but slaughter. His troops massacred so many citizens that blood reportedly ran through the streets in rivers. Sulla only stopped the killing when his Greek allies begged him to spare "the living for the sake of the dead." The city that had invented democracy was sacked by the republic it had inspired. Athens wouldn't recover its former glory for centuries, and Sulla? He marched back to Rome with enough plunder to fund his own civil war, making himself dictator of the very republic he claimed to be saving.

Four men to rule an empire that one couldn't hold. Diocletian knew Rome was crumbling under its own weight—barbarian invasions on every frontier, twenty-six emperors in fifty years, most assassinated by their own troops. So he did what no Roman emperor had dared: he shared power. Voluntarily. Diocletian took the East, Maximian the West, and beneath them Constantius Chlorus got Gaul while Galerius held the Danube. Each Caesar would eventually become an Augustus, then step down for the next generation. The system worked brilliantly for exactly twenty years—until Diocletian retired to grow cabbages in Croatia and everyone immediately started killing each other for sole control. Turns out Romans didn't want efficient government; they wanted glory.

Four emperors to rule one empire — Diocletian's answer to fifty years of chaos where 26 men claimed the purple and most died violently within months. On March 1, 293, he and co-emperor Maximian each appointed a junior Caesar: Constantius Chlorus in the west, Galerius in the east. The system was elegant: after twenty years, the senior Augusti would retire, the Caesars would step up, and they'd appoint fresh successors. No more civil wars, no more assassinations. It worked brilliantly for exactly twelve years, until Constantius died and his son Constantine — who wasn't supposed to inherit anything — refused to accept he didn't matter. The dynasty Diocletian designed to prevent launched the very power struggle that gave Christianity its first imperial champion.

Three toddlers became rulers of the Roman Empire on the same day. Constantine I elevated his own seven-year-old son Crispus to Caesar, while his co-emperor Licinius matched the move by promoting his infant son—barely old enough to walk. Constantine didn't stop there: he added his newborn Constantine II to the mix. The message was clear: this wasn't about governance, it was about dynasty. Within a decade, the fragile power-sharing collapsed into civil war, and Licinius Iunior was executed at age eleven. Constantine had used children as chess pieces in a game where losing meant death.

She handed him an empire like a dinner invitation. Constantina, sister to Emperor Constantius II, didn't wait for her brother's approval when she asked the aging general Vetranio to proclaim himself Caesar in 350. The troops in Illyricum cheered. For nine months, this reluctant emperor—a career soldier who'd never sought the throne—minted coins with his face and played at ruling. But Constantius was already marching west, and when the brothers-in-law finally met near Naissus, Vetranio did something no other usurper had managed: he survived. He gave a speech, abdicated on the spot, and retired to Bithynia on a generous pension. Sometimes the smartest move an emperor can make is refusing to be one.

The battle ended in a draw, but Afonso V was so convinced he'd lost that he fled 400 miles to a French monastery and tried to abdicate. His son João refused to accept the crown, so Portugal nearly lost its king to a crisis of confidence rather than military defeat. Meanwhile, Ferdinand and Isabella declared total victory at Toro, using the propaganda to legitimize their shaky hold on Castile and fund a small project called the Granada campaign. The real winner? Whichever side controlled the narrative. Portugal's chroniclers later spun the same battle as a triumph, and historians still can't agree who actually won—turns out the most decisive battles are fought with pens, not swords.

The Duke of Guise claimed he was just passing through town when his men attacked Huguenots worshipping in a barn. Seventy-four wounded, twenty-three dead in Wassy. It wasn't the first violence between French Catholics and Protestants, but this time the victims had royal permission to worship there. Catherine de Medici tried desperately to keep peace—she'd issued that edict protecting Huguenots just weeks earlier. But François de Guise rode straight to Paris afterward, celebrated as a hero. Eight civil wars would follow over the next thirty-six years, killing millions. The massacre that started it all? Guise insisted it was self-defense, that the Protestants threw stones first. A barn full of worshippers versus armed soldiers—and somehow, he convinced half of France.