March 1 in History

President John Tyler signed the joint resolution authorizing the annexation of the Republic of Texas on March 1, 1845, three days before leaving office. The resolution offered Texas admission to the Union as a state rather than as a territory, bypassing the normal annexation process and avoiding the two-thirds Senate majority that a formal treaty would have required. Texas had been an independent republic since 1836, when American settlers and Tejanos rebelled against Mexican rule, defeated General Santa Anna at the Battle of San Jacinto, and established a government under Sam Houston. The republic had sought annexation to the United States almost immediately, but the issue was politically toxic because Texas would enter as a slave state, upsetting the balance between free and slave states in the Senate. Tyler, a Virginia slaveholder who had become president after William Henry Harrison's death in 1841 and who had been expelled from his own Whig Party, saw annexation as his legacy. He negotiated an annexation treaty that the Senate rejected in June 1844. He then pushed for a joint resolution of both houses of Congress, which required only a simple majority. It passed the House 120 to 98 and the Senate 27 to 25. Mexico had never recognized Texas independence and considered annexation an act of war. The Mexican government broke diplomatic relations with the United States immediately. President James K. Polk, who succeeded Tyler, sent troops to the disputed territory between the Nueces River and the Rio Grande. A clash between American and Mexican forces in April 1846 provided the justification for the Mexican-American War. The war ended in 1848 with the Treaty of Guadalupe Hidalgo, which transferred California, New Mexico, Arizona, Nevada, Utah, and parts of Colorado and Wyoming to the United States. Texas annexation thus triggered a conflict that increased the size of the United States by roughly one-third. It also intensified the sectional crisis over slavery that would lead to the Civil War fifteen years later.

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 twenty-six men had claimed the purple and most died violently. On March 1, 293 AD, he formalized the Tetrarchy by appointing Constantius Chlorus and Galerius as junior emperors (Caesars), joining himself and Maximian as senior emperors (Augusti). The system divided the Roman Empire into four administrative zones, each governed by a Tetrarch with his own court, army, and capital. Diocletian took the wealthiest provinces in the East. Maximian controlled Italy and Africa. Constantius got Gaul and Britain. Galerius received the Balkans and the Danube frontier. The Tetrarchy was designed to solve two problems simultaneously: the empire was too large for one man to defend against simultaneous threats on multiple frontiers, and the succession crisis that had produced decades of civil war needed a systematic solution. Each Augustus would rule for twenty years, then retire and elevate his Caesar to senior rank while appointing a new junior colleague. The system was elegant on paper. It produced immediate results — border threats were suppressed, provinces stabilized, and civil war ceased. Diocletian himself retired voluntarily in 305, the first Roman emperor to abdicate, and forced Maximian to do the same. But the succession mechanism collapsed almost immediately. Constantius died in 306, and his troops proclaimed his son Constantine emperor, violating the Tetrarchic principle of merit-based appointment. Within two years, six men were claiming the title of emperor. The civil wars resumed. By 324, Constantine had defeated all rivals and ruled alone. Diocletian's system lasted twelve years in practice. Its legacy — the administrative division of the empire into eastern and western halves — lasted centuries.

Three toddlers became rulers of the Roman Empire on the same day. On March 1, 317 AD, Emperor Constantine I elevated his son Crispus and his infant son Constantine II to the rank of Caesar, alongside Licinius Junior, the infant son of his co-emperor Licinius I. The appointments were part of a diplomatic agreement between the two rival emperors following their war in 316-317. Each man named his sons as designated successors, establishing parallel dynastic lines within the Tetrarchic framework that Diocletian had created two decades earlier. Crispus was the oldest at approximately twelve, old enough to be given nominal military commands within a few years. Constantine II was barely a year old. Licinius Junior was about twenty months. The ceremony was a carefully staged display of shared imperial commitment, but the underlying reality was a cold calculation of power. Constantine and Licinius had already fought one war and were maneuvering for the next. Naming their sons as Caesars was simultaneously a peace gesture and a succession guarantee — if either emperor fell, his dynasty would survive through his heirs. The peace held for seven years. In 324, Constantine attacked Licinius, defeated him, and executed both Licinius and his son. Young Licinius Junior, who had been named Caesar at twenty months, was dead before his tenth birthday. Crispus, Constantine's most capable son, was executed by his own father in 326 under mysterious circumstances possibly involving allegations of adultery with his stepmother. Of the three boys elevated to imperial rank on that single day in 317, only Constantine II survived to adulthood, and he was killed in civil war against his brother in 340.

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 Wassy when his men attacked a Huguenot congregation worshipping in a barn on March 1, 1562. Seventy-four Protestants were killed and over a hundred wounded. Women and children were among the dead. The barn had been specifically designated for Huguenot worship under the Edict of January, which permitted Protestant services in limited locations outside city walls. Whether the massacre was premeditated or spontaneous remains debated, but the outcome was not ambiguous: it triggered the French Wars of Religion, a series of eight conflicts that devastated France for thirty-six years and killed approximately three million people. The Duke of Guise was the most powerful Catholic nobleman in France and the leader of the ultra-Catholic faction that viewed any tolerance of Protestantism as an existential threat to the kingdom and the faith. The Edict of January had been an attempt at compromise by the regent Catherine de Medici, and Guise considered it an intolerable concession. After Wassy, Protestant leaders mobilized their own militias, and France descended into civil war within weeks. The pattern established at Wassy — where religious disagreement became an excuse for mass killing — repeated throughout the wars, most notoriously in the St. Bartholomew's Day Massacre of 1572, when Catholic mobs killed thousands of Huguenots across France in a single week. The wars finally ended with the Edict of Nantes in 1598, which granted Huguenots limited but real religious freedom. That edict lasted until Louis XIV revoked it in 1685, starting the cycle of persecution again. Wassy was where the killing began, but the underlying conflict between religious pluralism and religious uniformity would convulse France for two centuries.