Forgotten History: Mexico accepted slave migrants fleeing the U.S.

The Underground Railroad ran south as well as north. For slaves in Texas, refuge in Canada must have seemed impossibly far away. Fortunately, slavery was also illegal in Mexico.

Researchers estimate 5,000 to 10,000 people escaped from bondage into Mexico, says Maria Hammack, who is writing her dissertation about this topic at the University of Texas at Austin. But she thinks the actual number could be even higher.

“These were clandestine routes and if you got caught you would be killed and lynched, so most people didn’t leave a lot of records,” says Hammack.

There’s some evidence that tejanos, or Mexicans in Texas, acted as “conductors” on the southern route by helping people get to Mexico. In addition, Hammack has also identified a black woman and two white men who helped enslaved workers escape and tried to find a home for them in Mexico.

Mexico abolished slavery in 1829 when Texas was still part of the country, prompting white, slave-holding immigrants to fight for independence in the Texas Revolution. Once they formed the Republic of Texas in 1836, they made slavery legal again, and it continued to be legal when Texas joined the U.S. as a state in 1845.

Enslaved people in Texas were aware that there was a country to the south where they could find different levels of freedom (though indentured servitude existed in Mexico, it was not the same as chattel slavery). Hammack has discovered one runaway named Tom who had been enslaved by Sam Houston. Houston was a president of the Republic of Texas who’d fought in the Texas Revolution. Once Tom got across the border, he joined the Mexican military that Houston had fought against.

Enslaved people got to Mexico in many different ways. Some went on foot, while others rode horses or snuck aboard ferries bound for Mexican ports. Stories spread about enslaved people who crossed the Rio Grande river dividing Texas from Mexico by floating on bales of cotton, and several Texas newspapers reported in July 1863 that three enslaved people had escaped this way. Even if this wasn’t logistically possible, the imagery of floating to freedom on a symbol of slavery was strong.

But it wasn’t only enslaved people in Texas who found freedom in Mexico. “I have found individuals who made it all the way from North Carolina, Mississippi, Louisiana, Alabama,” Hammack says.

Slaveholders knew that enslaved people were escaping to Mexico, and the U.S. tried to get Mexico to sign a fugitive slave treaty. Just as the Fugitive Slave Act of 1850 had compelled free states to return escapees to the south, the U.S. wanted Mexico to return escaped slaves to the U.S. But Mexico refused to sign such a treaty, insisting that all enslaved people were free when they set foot on Mexican soil. Despite this, some U.S. slave owners still hired slave catchers to illegally kidnap escapees in Mexico.

It’s unclear how organized the southern “underground railroad” was. Hammack says some enslaved people may have found their way to Mexico without assistance. Other evidence suggests tejanos, especially poor tejanos, played a part in helping escapees get to Mexico.

Fugitive Slave Act
The Fugitive Slave Act increased federal and free-state responsibility for the recovery of fugitive slaves, appointing federal commissioners empowered to issue warrants for their arrest.

Hammack and researcher Roseann Bacha-Garza have also identified a mixed-race family from Alabama who moved to southern Texas near the Rio Grande and helped enslaved people escape to Mexico. The wife, Matilda Hicks, was a formerly enslaved woman. Her husband, Nathaniel Jackson, was the son of the man whose plantation she used to work on.

In addition, some northern abolitionists traveled south to help enslaved people reach Mexico.

“I have come across abolitionists from the north who were going to Mexico to petition Mexico to allow them to buy land to establish colonies for runaway slaves and free blacks,” Hammack says. In the early 1830s, Quaker abolitionist Benjamin Lundy “was actively petitioning the Mexican government to allow for colonies to be established for, I guess what we would consider now, refugees.”

Lundy’s plan to start a free colony in Mexico’s Texas region was thwarted when it separated from Mexico and legalized slavery. Later, in 1852, Seminole groups that included runaway slaves successfully petitioned the Mexican government for land. “It still belongs to their descendants and they still live there to this day in Mexico,” Hammack says.

These and other refugees fleeing slavery through the southern “underground railroad” all benefited from Mexico’s willingness to give them a safe haven.

—-

BY BECKY LITTLE
History.com

Photo Credit:
The Fugitive Slave, painted by John Adam Houston.
Superstock/Everett

The Underground Railroad ran south as well as north. For slaves in Texas, refuge in Canada must have seemed impossibly far away. Fortunately, slavery was . . .

Follow Us On Google News | Get Our Newsletter



Trending News on PVDN

  • cancunCancún Ranks as Worst Tourist Destination of 2025 According to Google Reviews A recent survey of nearly 100,000 Google reviews has tagged Cancún as the most disappointing tourist city of 2025. The Daily Mail study examined feedback from the world’s 100 busiest destinations and found that 14.2 percent of Cancún’s reviews were negative—the highest share recorded among all cities analyzed. That mark put Cancún two full percentage…
  • real estate puerto vallartaHow safe is it to buy real estate in Puerto Vallarta? Jalisco’s Real Estate sector at risk: AMPI Warns Informality threatens Jalisco's booming real estate market. AMPI urges mandatory professional standards to protect consumers and secure investor trust. The president of AMPI Guadalajara, Karen Julieta Correa Cabrales, has raised alarms over the high level of informality in the region's real estate market. She warns that this lack of regulation is jeopardizing both consumer security and…
  • protest puerto vallarta trumpUS Citizens Abroad to Protest Trump’s Immigration Raids in Puerto Vallarta U.S. citizens residing abroad are set to hold a peaceful demonstration in Puerto Vallarta on June 14 to protest recent anti-immigrant raids in Los Angeles and to defend the U.S. Constitution and rule of law. The march, organized by the grassroots group No U.S. Kings Day and supported by Democrats Abroad Costa Banderas, aims to…
  • 5-de-diciembre-puerto-vallarta-neighborhoodAmerican tourist dies in fall at Hilton Hotel in Puerto Vallarta A 20-year-old tourist from Indiana died after falling from a balcony at the Hilton Hotel in Puerto Vallarta. Authorities are investigating the incident. An American tourist died Sunday afternoon after falling from a balcony at the Hilton Hotel in Puerto Vallarta, a popular resort located in the city’s south hotel zone. Authorities confirmed the victim…
  • puerto vallarta airportInternational Arrivals to Puerto Vallarta airport records eleventh straight month of decline International arrivals Puerto Vallarta May 2025 fell 9.1 percent year-over-year in May, marking the eleventh straight monthly decline despite gains in domestic travel. Puerto Vallarta International Airport saw international arrivals fall 9.1 percent in May 2025 compared to May 2024, marking the eleventh consecutive month of declines. 236,100 passengers arrived on international flights last month,…
  • crime-sceneItalian Tourist Dies After Falling at Sayulita Rental Property Sayulita, Nayarit – Early on Tuesday, June 10, 2025, an Italian tourist identified as 37-year-old Giacomo “N” died after plunging from an upper floor of a vacation rental in the pueblo mágico of Sayulita, in the municipality of Bahía de Banderas. Emergency services pronounced him dead at the scene, where he was found in the…
  • cjngLos Chapitos and CJNG Form Supercartel to Control Mexican Drug Trade Los Chapitos and the CJNG form an unprecedented alliance, escalating cartel violence and drug trafficking threats across Mexico. A new alliance between Los Chapitos, the faction controlled by the sons of Joaquín "El Chapo" Guzmán, and the powerful Cartel Jalisco Nueva Generación (CJNG) has alarmed authorities and analysts, potentially reshaping Mexico’s criminal landscape. The partnership,…
  • don-balde-killed-chiapas-border-operationDon Balde killed in Chiapas border operation Don Balde killed during a June 8 operation by the Pakal Reaction Force in Las Champas, Chiapas, ending his role as founder of the Chiapas-Guatemala cartel and CJNG collaborator. On Sunday, June 8, in the commercial border zone of Las Champas, Frontera Comalapa in Chiapas, elements of the Fuerza de Reacción Inmediata Pakal shot and…
  • puerto vallarta holy week hotelsTourism groups warn 40 hour work week will hurt Puerto Vallarta France has a 35 hour work week and is the largest tourist destination in the world, but Puerto Vallarta tourism companies say working less than 48 hours will hurt the city. Company greed is fighting Mexico's change to protect worker's rights. The Chamber of Commerce, Services and Tourism of Puerto Vallarta (Canaco Servytur PV) and…
  • security-operations-bahia-de-banderasBahía de Banderas Tightens Border with Puerto Vallarta in Response to Rise in Cross-Municipal Crimes Recent security operations in Bahía de Banderas along the Puerto Vallarta border involve coordinated patrols by SEMAR, SEDENA, National Guard, and municipal police to curb crime and protect residents. Local, state and federal agencies have launched joint security operations along the border between Bahía de Banderas and Puerto Vallarta in response to a recent rise…
Scroll to Top