It's Not What You Think It Is

Today is Cinco de Mayo — May 5, 2026 — and somewhere in the United States, someone is wishing their Mexican American neighbor a happy Mexican Independence Day. That day is September 16th. It marks the beginning of Mexico's fight for independence from Spain, in 1810 — a watershed moment in Mexican history deeply and formally celebrated across the entire country every year. Cinco de Mayo is something else entirely: the anniversary of a single battle, fought on May 5, 1862, in the hills above the city of Puebla, in which a ragtag Mexican army of somewhere between 2,000 and 5,000 soldiers defeated a French imperial force of roughly 6,000 — considered among the finest armies in the world. The battle did not win the war. The French came back the following year, took Puebla, occupied Mexico City, and installed a Habsburg archduke as emperor. And yet the day it happened — the day the underdog stood its ground — turned into a holiday that would travel north across the border and eventually generate beer sales in the United States on par with the Super Bowl. The story of how that happened is, like the battle itself, improbable and worth knowing.

The Battle That May Have Saved the Union

On May 5, 1862, French troops under General Charles de Lorencez advanced on Puebla, a city about 80 miles southeast of Mexico City, expecting a quick and decisive victory. The French army had not been defeated in nearly 50 years. Against them stood General Ignacio Zaragoza — born in what is now Goliad, Texas — commanding a force that was outgunned, outequipped, and vastly outnumbered. The battle lasted from daybreak to early evening. Zaragoza fortified the hilltop forts of Loreto and Guadalupe, used guerrilla tactics to compensate for his disadvantage in firepower, and launched a well-timed cavalry attack on the French flank at a critical moment. When Lorencez finally withdrew his defeated army, it was a stunning result that reverberated far beyond Mexico. Four months later, Zaragoza died of typhoid fever. He never saw what his victory set in motion.

What it set in motion, historians have argued, may have extended well beyond Mexican borders. In 1862, the American Civil War was raging simultaneously, and France under Napoleon III was weighing whether to recognize the Confederacy. The French had a plan: ship long-range artillery overland through Texas to Confederate armies in the east, potentially circumventing the Union naval blockade. The Battle of Puebla delayed the French advance for nearly a year, buying time for the Union. By the time French forces finally gained control of the Mexican border with Texas in the summer of 1863, General Ulysses S. Grant had won the Battle of Vicksburg, cutting off the Confederacy's access to weapons from the west. The French window had closed. Mexican communities in California — strong Union supporters who had followed every dispatch from Puebla in Spanish-language newspapers — understood the connection immediately. They had formed 129 patriotic organizations, raised money for Juárez's army, and begun celebrating Cinco de Mayo in 1862, the same year the battle was fought. The holiday that millions of Americans observe today was, at its origin, an act of political solidarity in the middle of the American Civil War.

The holiday traveled a long way from Puebla to become what it is today — reshaped by the Chicano Movement of the 1960s, commercialized by beer and spirits companies in the 1980s, and ultimately transformed into something far larger and looser than its origins. In Mexico itself, Cinco de Mayo is observed primarily in the state of Puebla; for the rest of the country, it is a minor ceremonial date. The giant, margarita-filled American version of the holiday is largely an American invention, bearing the same relationship to the Battle of Puebla that St. Patrick's Day bears to the arrival of Christianity in Ireland — a specific historical event refracted through immigrant identity, popular culture, and considerable commercial interest into something both connected to and very different from its source. None of that makes today's celebrations less joyful. It makes them more interesting. The ragtag army that held the hilltop above Puebla on May 5, 1862, had no idea their day of survival would eventually become an occasion for 400 million pounds of avocados to be consumed in the United States in a single week. History rarely goes where it intends.