Support for slavery helped drive Texas to revolt against Mexico

Learn how Mexico’s anti-slavery stance shaped the US–Texas conflict

Historian Alice Baumgartner explores how Mexico’s abolition of slavery clashed with Anglo settlers' ambitions in Texas. The episode reveals how enslaved people fled south to freedom, reshaping the politics that led to Texas independence and the Mexican-American War.

American annexation of Texas eventually sparked war with Mexico

After Texas won independence from Mexico in 1836, the US annexed it in 1845—despite Mexico’s refusal to recognize Texas as separate. That annexation, combined with a heated border dispute, triggered the Mexican-American War the following year.

Mexico admired Lincoln for opposing the war and supporting Mexican sovereignty

As a congressman, Abraham Lincoln condemned the Mexican-American War as unjust. Years later, as president, he backed Mexico’s fight against French occupation. His principled stance earned enduring respect and monuments across Mexico.

The Compromise of 1850 tried to settle disputes over land gained from Mexico

Territory acquired in the Mexican-American War reignited fierce debates over slavery’s expansion. The Compromise of 1850 aimed to ease tensions by admitting California as a free state and letting other territories decide the issue—but the compromise ultimately failed and helped pave the way to the Civil War.

US westward expansion—and the status of slavery in the new territories—was a major cause of the American Civil War

The addition of new western lands forced the nation to confront whether slavery would spread beyond the South. Each debate over the admission of a new state sharpened the divide between free and slaveholding regions.

The origins and growth of the Juneteenth holiday

The American holiday of Juneteenth celebrates the emancipation of African American slaves, a process which unfolded over the four years of the Civil War and several months afterward. June 19 took on special significance as the day Union officials proclaimed slaves free in Texas in 1865, the last holdout after the Civil War ended. Roughly 4 million people were freed from slavery as a result of emancipation. Read this brief article summarizing the holiday's development.

A wave of Latin American independence movements most likely prompted the Monroe Doctrine

Between 1810 and 1822, many Latin American colonies separated from Spanish rule, 10 in the last two years. Concerns that Spain and its European allies might try to regain these republics were a main reason behind Monroe's declaration.

US troops committed widespread atrocities during the Mexican-American War

American volunteer regiments frequently looted towns, raped civilians, and executed prisoners—especially in occupied northern Mexico. Historians have documented how racial hatred and impunity fueled war crimes that were rarely punished by military leadership.

Irish immigrants deserted the US Army to fight for Mexico

During the Mexican-American War, hundreds of Irish Catholic immigrants—facing discrimination in the US Army—defected to Mexico and formed the Saint Patrick’s Battalion. Though many were captured and executed, they remain honored as heroes in Mexico.

According to Confederate leaders, the defense of slavery was the primary reason for secession

Confederate leaders cited slavery as the reason for secession. Vice President Alexander Stephens called it the Confederacy's "cornerstone," built on "the great truth that the Negro is not equal to the white man."

Abolitionists shaped American history from the Revolution to the Civil War

Abolitionists of all backgrounds organized against slavery from the founding era onward. Historian Manisha Sinha argues that their decades of activism fundamentally shaped American democracy and made emancipation possible.

Thoreau's 'Civil Disobedience' was largely a protest against the Mexican-American War

Henry David Thoreau refused to pay taxes that funded what he saw as an unjust war waged to expand slavery. His act of protest inspired his famous essay "Civil Disobedience," a foundational text for nonviolent resistance.

Some historians claim that Mexico's victory at Puebla may have prevented France from arming the Confederacy

According to some experts, Napoleon III planned to ship weapons from Mexico to Confederate forces to break the Union naval blockade. The delay caused by the Battle of Puebla meant French resources didn't reach the Texas border until after the Union Army's decisive victory at Vicksburg.

France, Spain, and Britain formed a joint military alliance to force Mexico to repay its debts

In October 1861, the three powers signed the Convention of London and landed troops at Veracruz that December. Britain and Spain reached settlements with Mexico and withdrew. France refused and aimed to change the regime in power in Mexico.

Opposition to British taxes, regulation of trade was key to American independence

The economic situation in the colonies formed the backbone of the central events of the Revolution. British war debts caused it to lay the first direct taxes on colonists, cease their westward expansion claims, and adhere to stringent trade regulations, leading to backlash and eventual separation.

Discover why Texas runs its own electric grid, separate from the other US interconnections

In 1935, electrical utilities in the Lone Star State opted to rely on the state's own fossil fuel reserves to power an independent electric grid. While this prevented the federal oversight required for the Eastern and Western Interconnections that span multiple states, it also meant Texas's grid was unable to draw sufficient backup power during the winter 2021 power grid failure.

The trans-Atlantic slave trade brought over 10 million enslaved people to the Americas

During the Atlantic slave trade (1526-1867), about 12.5 million Africans were forced onto ships; only 10.7 million survived to reach the Americas. Fewer than 400,000 arrived in what became the United States—the rest were taken to the Caribbean or Latin America.

Hamilton opposed slavery in principle but participated in the institution

Alexander Hamilton spoke against slavery, helped found the New York Manumission Society, and supported gradual emancipation while also participating in transactions involving enslaved people through his in-laws—and possibly within his own household, though historians debate this.

The Aztec Empire explained

Tenochtitlán grew into a powerful city-state supported by innovations such as chinampa farming and its central role in the Triple Alliance. Spanish forces later exploited internal rifts to overthrow the empire, but the city’s legacy endures in modern Mexico City’s historic core.

Texas' includes German, Mexican, and Polish influences

Beef brisket, served with white bread and pickles, and sausage—a holdover from German immigration in the 1800s—are two of the most popular dishes. The southern end of the state brings together Mexican barbacoa and fajitas.

Southern race riots in 1866 galvanized support for more radical Reconstruction

In 1866, white mobs in Memphis and New Orleans killed dozens of Black residents and burned Black neighborhoods. The massacres horrified Northerners, convincing Congress that stronger federal action was needed to protect freedpeople's rights and enforce Reconstruction.

Mexican Independence Day is celebrated on September 16

Cinco de Mayo is widely mistaken for Mexican Independence Day. September 16 is the actual date, commemorating the 1810 Grito de Dolores, Father Miguel Hidalgo's call to revolution that launched Mexico's war against Spanish colonial rule.

Read Truth's account of escaping slavery in 1826

After her enslaver broke his promise to free her, Truth left before dawn, carrying her infant daughter and a bundle of clothes. She later found refuge with the Van Wagener family, who paid her master $20 for her freedom and $5 for her infant daughter.

This Texas city is having an 'amputation crisis'

Texas has some of the highest rates of diabetes-related amputations in the country. Towering over the rest of the Longhorn state is the city of San Antonio, where men are nearly three times as likely to lose a limb to diabetes than women. This article explains how men in this majority Mexican American city are genetically and culturally at risk of Type 2 diabetes, a disease involving issues with the blood sugar-regulating hormone insulin.

Tequila is made from the blue agave plant and can only be produced in Mexico

By law, tequila must be produced from blue Weber agave grown in Jalisco and a handful of other Mexican states. The plant takes years to mature before harvest, after which it is cooked, crushed, fermented, and distilled into blanco, reposado, or añejo, depending on its aging process.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Meet the 56 signers of the Declaration of Independence—most of whom didn't put pen to paper until August 2, 1776—and see their original signatures.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

Mark Twain spent decades feuding with the US Postal Service, convinced its costs and regulations were bureaucratic overreach.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

Despite being favored by 87% of Americans, Congress does not have term limits.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

Tattoos remain visible on your skin thanks to immune cells called macrophages

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

While El Niño moves warm Pacific Ocean waters east along the equator, La Niña moves them west, shifting where rainfall will become more common for months.