What role did slavery play at the Alamo, and what did Juneteenth mean for Black Texans?
The people enslaved in Texas did not spend two and a half years waiting for a message to arrive. They lived under people who had the power, the financial incentive, and the determination to keep them enslaved. Some enslavers withheld the news even after the U.S. Army issued its order in Galveston. The difference between hearing about freedom and being able to claim it is central to this history.
I would describe Texas as a last Confederate stronghold of slavery. Slavery remained legal in the Union states of Kentucky and Delaware after June 19, 1865, because the Emancipation Proclamation applied to places in rebellion. The Thirteenth Amendment ended legal chattel slavery nationwide that December. What makes Juneteenth distinctive is that Black Texans made the day federal emancipation was announced in Galveston into a freedom anniversary, and their families carried that tradition across the country.
Before the Alamo, an Afro-Mexican president challenged slavery
The leader was Vicente Guerrero, an independence fighter whom Mexico’s National Human Rights Commission identifies as the country’s first Afro-Mexican president. On September 15, 1829, he issued an abolition decree. Its reach was Mexican territory, which then included Texas. The man who commanded Mexico’s army at the Alamo seven years later was Antonio López de Santa Anna. Keeping those two men distinct helps explain what happened between abolition and revolution.
Mexico had encouraged settlement in its northern territory. Many settlers from the American South brought enslaved Black people with them and wanted to grow cotton under the same labor system they knew at home. When Mexican authorities restricted slavery, some settlers used long-term labor contracts to keep people in bondage. Guerrero’s decree posed a direct threat to that arrangement. Officials intervened on the settlers’ behalf, and Texas obtained an exemption in December 1829. That exemption matters. Six years before the revolution, slaveholders in Texas already had experience pressing a government to protect their claims over other human beings.
What were people fighting for at the Alamo?
In San Antonio in 1836, several conflicts converged. Santa Anna had dismantled Mexico’s federal system and concentrated power in the central government. Mexican federalists resisted him, including Tejanos who wanted to restore the Constitution of 1824. Anglo settlers also had disputes with Mexico over immigration, trade, and local government. For slaveholders, independence offered something especially valuable: the power to write slavery into the law themselves. These interests could bring people into the same rebellion for different reasons. The defenders included Tejanos, and opposition to Santa Anna extended well beyond Texas.
The sequence tells the story. While the Alamo was under siege, delegates meeting at Washington-on-the-Brazos declared Texas independent on March 2, 1836. Santa Anna’s troops took the Alamo on March 6. Later that same month, the new republic adopted a constitution whose General Provisions, Section 9, protected slaveholders’ ability to bring enslaved people into Texas, denied Congress the power to emancipate them, and required the consent of Congress for a free person of African descent to live permanently in the republic. That document gives us firmer ground than guessing what every defender privately believed. Whatever brought individual men to the Alamo, the republic their rebellion produced made slavery a constitutional commitment.
A Black man inside the Alamo saw a different fight for freedom
His name was Joe. William Barret Travis, the Alamo commander, enslaved him. According to the Handbook of Texas, Joe took up a gun during the assault, survived, and later gave an account of the battle. Afterward, Travis’s estate continued to claim him as property. In 1837, Joe escaped. The executor offered $50 for his capture.
For a San Antonio reader, Joe changes the question. When someone says the men at the Alamo “fought for freedom,” whose freedom do they mean? Joe had been inside the fortress. He had survived the assault. Yet Texas independence left him enslaved. To secure his own liberty, he had to leave the people who claimed to own him. And for other enslaved Texans in the decades that followed, the route to freedom ran south into Mexico. The National Park Service documents people who took that route, reversing the direction many Americans instinctively associate with escape from slavery.
From the Alamo to Juneteenth
Texas joined the United States in 1845. By 1860, the census counted 182,566 enslaved people in Texas, more than 30 percent of the state’s population. And when Texas secession delegates explained in 1861 why they wanted to leave the United States, they explicitly defended African slavery and rejected racial equality. Here the political leadership left its reasoning in its own words.
On June 19, 1865, Union General Gordon Granger issued General Order No. 3 in Galveston. It declared that “all slaves are free.” But read farther down: the same order advised freed people to stay where they were and work for wages. Within one document you can see both the magnitude of the change and the struggle already underway over who would control Black labor afterward.
That’s why I’d give Black Texans themselves the last word in how this story is told. Texas slaveholders fought to preserve bondage. Black Texans chose to commemorate freedom. In 1872, formerly enslaved Houstonians, with leaders including Reverend Jack Yates, pooled their money to buy ten acres for Juneteenth gatherings. That land became Emancipation Park. Families who had once been treated as property bought property together so their children would have a place to remember. That is part of what the celebration means, too.
Read the historical records
- Juneteenth fact sheet · Congressional Research Service
- Vicente Guerrero · Mexico’s National Human Rights Commission
- Guerrero Decree · Handbook of Texas
- Texas Declaration of Independence · Texas State Library
- Republic of Texas Constitution, General Provisions · Tarlton Law Library
- Joe · Handbook of Texas
- Freedom seekers in the Texas–Mexico borderlands · National Park Service
- Slavery in Texas · Texas State Library
- Declaration of Causes, 1861 · Texas State Library
- General Order No. 3 · National Archives
- Emancipation Park · Houston