TLDR
The Underground Railroad was a secret network of Black and white abolitionists who helped enslaved people escape to free territory in the northern United States, Canada, and Mexico. About 30,000 people reached freedom this way, and Harriet Tubman became its most famous conductor before serving the Union Army during the Civil War.

Why This Matters for the AP African American Studies Exam
This topic builds your understanding of organized resistance to slavery and how enslaved people drove their own liberation. You will see required sources here, including Harriet Tubman's reflection in The Refugee and an excerpt from Harriet, the Moses of Her People. Both are first-person and secondhand accounts that you can analyze for purpose, perspective, and reliability, which is a core skill across the exam.
The Underground Railroad also connects to bigger themes you can use in argument-based and source-based questions: resistance, abolitionism, the role of spirituals as coded communication, and how federal law (the Fugitive Slave Acts) responded to mass escape. You can link this material backward to spirituals and daily resistance, and forward to the Civil War and emancipation.
Key Takeaways
- The Underground Railroad was a covert network of Black and white abolitionists offering transportation, shelter, and resources, not a literal railroad.
- An estimated 30,000 African Americans reached freedom through it, resettling in the northern United States, Canada, and Mexico.
- The Fugitive Slave Acts of 1793 and 1850 let local governments capture and return freedom seekers, making escape and helping escapees more dangerous.
- Harriet Tubman returned to the South at least 19 times and led about 80 people to freedom, using spirituals to signal escape plans.
- Tubman served as a spy and nurse for the Union Army and became the first American woman to lead a major military operation during the Combahee River raid.
- Enslaved people's own determination to free themselves powered the network's success.
The Underground Railroad
The Underground Railroad was not a literal railroad beneath the ground. It was a covert network of Black and white abolitionists who provided transportation, shelter, and other resources to help enslaved people fleeing the South resettle in free territory. Those escape routes reached the northern United States, Canada, and Mexico during the nineteenth century.
The network worked through safe houses and secret routes, and many freedom seekers traveled at night. Spirituals carried coded meanings that alerted enslaved people to escape opportunities, which ties this topic directly to how religious music functioned as both faith and resistance.
This was an interracial movement, but enslaved people themselves took the first and most dangerous step. Their determination to free themselves fueled the network's success.
- Black abolitionists, many formerly enslaved, served as conductors and organizers, using firsthand knowledge to guide others.
- White abolitionists, often motivated by moral opposition to slavery, provided shelter, funding, and transportation, risking legal penalties.
Scale and Significance
An estimated 30,000 African Americans reached freedom through the Underground Railroad. That number was a small fraction of the millions still enslaved, but the impact reached further than the count suggests. Successful escapes showed enslaved communities that freedom was possible and inspired continued resistance.
One source caution to remember: because this was a covert process, surviving records are incomplete and sometimes shaped by the people who wrote them. Early portrayals that suggested the network was small or unimportant were not accurate. When you analyze sources about the Underground Railroad, read them critically against the conditions that produced them.
The Fugitive Slave Acts
Because so many African Americans fled enslavement, Congress passed the Fugitive Slave Acts of 1793 and 1850. These laws authorized local governments to capture and return freedom seekers to their enslavers, even in free states.
- The 1793 Act allowed slave catchers to cross into free states to seize escapees and punished people who sheltered them.
- The 1850 Act expanded those powers, requiring citizens in free states to help capture escapees or face fines and imprisonment.
These laws made the Underground Railroad far more dangerous. Abolitionists faced serious legal consequences for helping, and freedom seekers lived under constant threat of recapture even in the North. The 1850 Act in particular pushed many people to flee all the way to Canada, where they were protected from forced return.
Harriet Tubman
Harriet Tubman is one of the most well-known conductors of the Underground Railroad. After fleeing enslavement, she returned to the South at least 19 times and led about 80 enslaved African Americans to freedom. She sang spirituals to alert enslaved people of plans to leave, turning familiar songs into signals.
Spy and Nurse for the Union Army
During the Civil War, Tubman used her deep geographic knowledge and her social network to serve as a spy and nurse for the Union Army. Her intelligence work and her care for wounded soldiers and newly freed people show how her skills from the Underground Railroad carried directly into the war effort.
The Combahee River Raid
During the Combahee River raid in South Carolina, Tubman became the first American woman to lead a major military operation. The raid freed hundreds of enslaved people and disrupted Confederate supply lines, demonstrating Black women's leadership in the fight for freedom.
How to Use This on the AP African American Studies Exam
Using Sources Effectively
The two required sources here are both about Tubman but differ in important ways. Note the distinction when you analyze them:
- The Refugee by Benjamin Drew (1856) is the only known text to capture Tubman's speech directly.
- Harriet, the Moses of Her People by Sarah H. Bradford (1886) is based on interviews with Tubman, but the author took creative license, including writing Tubman's speech in dialect.
When you compare them, point out how authorship, distance from the events, and the writer's choices shape what each source can and cannot tell you.
Building Arguments
Use the Underground Railroad as evidence for claims about organized resistance and self-liberation. A strong point to make is that enslaved people's own choices drove the network, not just outside helpers. You can also connect the Fugitive Slave Acts to the idea that law adapted to suppress Black freedom, which links this topic to slave codes and landmark cases.
Common Trap
Do not overstate exact numbers as if they are precise. The 30,000 figure and Tubman's roughly 80 rescues are estimates. Present them as approximate, and be ready to explain why covert records make exact counts impossible.
Common Misconceptions
- The Underground Railroad was not an actual underground train. It was a network of people, routes, and safe houses.
- It did not run only to the northern United States. Routes also led to Canada and Mexico, and the 1850 Fugitive Slave Act pushed many people to Canada specifically.
- Harriet Tubman was famous, but she was one of many conductors. The network depended on countless Black and white participants, and most importantly on the enslaved people who chose to escape.
- Reaching a free state did not mean safety. The Fugitive Slave Acts allowed recapture in free states, so legal freedom and actual security were not the same.
- The "Moses" nickname is symbolic. Tubman did not have official military rank during her Underground Railroad work, though she later led the Combahee River raid for the Union.
Related AP African American Studies Guides
Vocabulary
The following words are mentioned explicitly in the College Board Course and Exam Description for this topic.Term | Definition |
|---|---|
abolitionism | The political movement and activism aimed at ending slavery and the slave trade. |
abolitionists | Individuals who actively worked to end slavery and support the freedom of enslaved people. |
Combahee River raid | A military operation during the Civil War led by Harriet Tubman that resulted in the liberation of enslaved people. |
conductor | A person who guided enslaved people along the Underground Railroad to freedom. |
enslaved Africans | People of African descent who were forcibly captured and transported across the Atlantic Ocean to be held in bondage in the Americas. |
free territories | Geographic regions in the North, Canada, and Mexico where slavery was prohibited or not legally enforced during the nineteenth century. |
Fugitive Slave Acts | Federal legislation enacted in 1793 and 1850 that authorized local governments to legally capture and return escaped enslaved people to their enslavers. |
spirituals | Religious songs created by enslaved African Americans that blended African musical traditions with Christian themes and served as expressions of faith and resistance. |
Underground Railroad | A covert network of Black and white abolitionists who provided transportation, shelter, and other resources to help enslaved people flee the South to free territories in the North, Canada, and Mexico during the nineteenth century. |
Frequently Asked Questions
What is the Underground Railroad and how did it actually work?
The Underground Railroad was a covert network of Black and white abolitionists who helped freedom-seeking people escape slavery in the nineteenth century (LO 2.20.A). About 30,000 African Americans reached freedom this way. It wasn’t a literal railroad—people called “conductors” (like Harriet Tubman) guided escapees between “stations” or safe houses, using secret signals (including spirituals) and safe routes toward free states, Canada, or Mexico. Networks provided transport, shelter, food, forged papers, and local knowledge; self-emancipation by the enslaved was the crucial first step. Because so many fled, Congress passed Fugitive Slave Acts (1793, 1850) to authorize capture and return, which pushed routes farther north and increased secrecy. For Tubman specifically, she made at least 19 trips and led about 80 people to freedom (LO 2.20.B). For more detail and AP-aligned review, check the Topic 2.20 study guide on Fiveable (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR).
Why did Congress pass the Fugitive Slave Acts of 1793 and 1850?
Congress passed the Fugitive Slave Acts (1793 and the much stronger 1850 law) mainly to protect enslavers’ “property” and stop the growing number of self-emancipated people reaching free territories. By the mid-1800s so many people escaped via the Underground Railroad (an estimated 30,000 reached freedom) that Southern politicians pressured Congress to require officials—and in 1850 even ordinary citizens—to help capture and return runaways. The 1850 Act increased federal power: it created special commissioners, imposed heavy penalties on people who helped fugitives, and limited legal protections for alleged escapees. In short, both laws were responses to the scale of flight and abolitionist activity; they aimed to deter escapes, undercut abolitionist networks, and keep slavery protected across state lines (see EK 2.20.A.3). For more on Topic 2.20, check the Fiveable study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) or unit review (https://library.fiveable.me/ap-african-american-studies/unit-2). Practice questions: (https://library.fiveable.me/practice/ap-african-american-studies).
How many enslaved people actually escaped through the Underground Railroad?
Good question—historians estimate about 30,000 people reached freedom via the Underground Railroad in the nineteenth century (CED EK 2.20.A.2). That number comes from piecing together records, narratives, and abolitionist accounts, but it’s an estimate because the network was secretive and many self-emancipations went undocumented. The CED also highlights Harriet Tubman’s documented role—she made at least 19 trips and led about 80 people to freedom (EK 2.20.B.1)—which shows both individual impact and the broader scale. Remember: because so much was covert, surviving sources undercount escapes; enslaved people’s own choices and courage were central to the Railroad’s success. For more on this topic and CED-linked details, check the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR). Practice more related questions at (https://library.fiveable.me/practice/ap-african-american-studies).
Who was Harriet Tubman and why is she so famous?
Harriet Tubman was an escaped enslaved woman who became one of the most famous “conductors” on the Underground Railroad. After fleeing Maryland, she risked the South—returning at least 19 times—to guide about 80 people to freedom, using spirituals as signals and a network of Black and white abolitionists (LO 2.20.B; EK 2.20.B.1). She also served the Union Army as a nurse and spy (EK 2.20.B.2), and during the Combahee River raid she became the first American woman to lead a major military operation (EK 2.20.B.3). Tubman’s life connects directly to Topic 2.20’s focus on self-emancipation, conductors, stations, and the scale of escape routes (see the Topic 2.20 study guide: https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR). For AP prep, read primary accounts like Tubman’s reflection in Benjamin Drew’s The Refugee and Sarah Bradford’s Harriet, the Moses of Her People, and practice related questions at (https://library.fiveable.me/practice/ap-african-american-studies).
I'm confused about how the Underground Railroad was "underground" - was it actually underground tunnels?
Short answer: no—the “Underground Railroad” wasn’t a system of literal tunnels. It was a covert network of people and places—escape routes, “conductors” (like Harriet Tubman), and “stations” or safe houses—who helped freedom-seeking people move north, to Canada, or Mexico. Operatives used coded language and signals (spirituals, secret messages), timed travel at night, and relied on trusted routes and homes to hide fugitives. An estimated 30,000 people reached freedom via this network (CED EK 2.20.A.1–2). Because this was illegal, laws like the Fugitive Slave Acts made it dangerous and pushed the network to be secretive rather than subterranean. For a quick CED-aligned review, check the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR). For practice Qs on related ideas, see Fiveable’s practice page (https://library.fiveable.me/practice/ap-african-american-studies).
What's the difference between abolitionists and people who just helped with the Underground Railroad?
Short answer: abolitionists were people who argued publicly and politically that slavery should end; helpers on the Underground Railroad were people who took direct, often secret, action to assist individuals escaping slavery. The abolitionist movement (led by Black activists and white supporters) used speeches, newspapers, organizations, and legal arguments to change public opinion and policy. The Underground Railroad was a covert network—conductors (like Harriet Tubman) and "stations"/safe houses provided transport, shelter, and resources so freedom-seekers could reach the North, Canada, or Mexico (an estimated ~30,000 reached freedom)—but not everyone who ran a safe house called themselves an abolitionist. Because of laws like the Fugitive Slave Acts, many helpers took great legal risk. For AP exam work, LO 2.20.A and LO 2.20.B expect you to differentiate movement-level activism (abolitionism) from on-the-ground resistance and to analyze sources like Tubman’s testimony (see the Topic 2.20 study guide for details) (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR). For extra practice, try the AP practice problems (https://library.fiveable.me/practice/ap-african-american-studies).
How did Harriet Tubman use spirituals to communicate with enslaved people?
Harriet Tubman used spirituals as coded, practical signals to coordinate escapes. After she escaped, Tubman returned at least 19 times and “sang spirituals to alert enslaved people of plans to leave” (CED EK 2.20.B.1). Spirituals had double meanings—lyrics that sounded religious to outsiders but told listeners when to move, where to meet, or which route to take (songs like “Wade in the Water” or “Follow the Drinking Gourd” are classic examples of this practice). Tubman’s singing also helped calm people, mask furtive activity, and sometimes mislead patrols. Benjamin Drew’s The Refugee records Tubman’s own speech about this practice (required source). On the AP exam, expect questions that ask you to analyze how spirituals functioned as signals or sources—good for SAQs or DBQ source analysis. For more review, check the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) and try practice problems (https://library.fiveable.me/practice/ap-african-american-studies).
Why did Harriet Tubman keep going back to the South if she was already free?
Harriet Tubman kept going back to the South even after she was free because she risked her own safety to rescue family and others—she returned at least 19 times and led about 80 people to freedom (EK 2.20.B.1). Tubman saw escape as a collective project: the Underground Railroad was a covert network of Black and white abolitionists who hid, guided, and moved freedom-seekers (EK 2.20.A.1). She used deep local knowledge, spirituals as signals, and bravery to bring people north or to Canada despite the Fugitive Slave Acts that made capture and legal return possible (EK 2.20.A.3). For AP review, remember LO 2.20.B focuses on her role and contributions—check the Topic 2.20 study guide on Fiveable for source details and practice questions (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR).
What role did Harriet Tubman play in the Civil War besides the Underground Railroad?
Besides her Underground Railroad work, Harriet Tubman played important roles for the Union during the Civil War. She used her geographic knowledge and abolitionist networks to serve as a spy, gathering intelligence about Confederate positions and movements. She also worked as a nurse, tending wounded Black and white soldiers and helping care for formerly enslaved people who came under Union protection. Most famously, Tubman helped plan and guided the Combahee River raid in 1863—becoming the first American woman to lead a major military operation when Union forces used the raid to free enslaved people in coastal South Carolina (CED EK 2.20.B.2–B.3). For AP prep, that’s exactly what LO 2.20.B asks you to know. Want a quick review? Check the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) and try practice questions (https://library.fiveable.me/practice/ap-african-american-studies).
How do I write a DBQ essay about the effectiveness of the Underground Railroad?
Start with a clear thesis that answers “How effective was the Underground Railroad?” (claim + line of reasoning). Immediately give context: growing self-emancipation, about 30,000 reached freedom, and Congress passed the Fugitive Slave Acts to block escape (use EK 2.20.A.2–3). Use at least three documents (the DBQ requires evidence from ≥3 sources) and one piece of outside evidence (e.g., routes to Canada, abolitionist networks). For each source name it, summarize the relevant detail (e.g., Tubman led ~80 people and returned ~19 times; she used spirituals and networks—EK 2.20.B.1) and explain how it supports or qualifies your claim. Do at least two source analyses that explain perspective, purpose, context, or audience. Finish by weighing limits (legal risks from Fugitive Slave Acts) vs. impact (thousands freed, pressured national debate). Follow the AP DBQ rubric: thesis, context, source evidence (3+), outside evidence, sourcing for 2+ docs, and reasoning. Use the Topic 2.20 study guide for source details (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) and practice more DBQs at (https://library.fiveable.me/practice/ap-african-american-studies).
What was the Combahee River raid and why was it significant that Tubman led it?
The Combahee River raid (June 1863) was a Union-guided mission in South Carolina where small gunboats and Black troops destroyed Confederate supplies and—crucially—freed more than 700 enslaved people as plantations were abandoned. Harriet Tubman helped plan and served as a scout and spy; she guided the boats through marshes using her geographic knowledge and networks. It’s significant she led it because, per the CED (EK 2.20.B.2–3), Tubman became the first American woman to lead a major military operation—moving from Underground Railroad conductor to active Union operative. That leadership showed how abolitionist skills (terrain knowledge, clandestine networks, use of spiritual signals) translated into wartime liberation, and it expanded Tubman’s role from rescuing roughly 80 people on the Railroad to coordinating mass emancipation under military authority. For the exam, connect this to LO 2.20.B and the Underground Railroad’s scale (EK 2.20.A.1–3). For more concise review and practice Qs, see the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) and practice problems (https://library.fiveable.me/practice/ap-african-american-studies).
How did the Underground Railroad connect to the broader abolitionist movement in America?
The Underground Railroad was a key practical arm of the broader abolitionist movement: it connected Black and white abolitionists, churches, and activists into a covert network that provided transportation, shelter, and resources to freedom-seekers (EK 2.20.A.1). An estimated 30,000 people escaped via these routes, which helped turn self-emancipation into a mass phenomenon and fueled political debates that led Congress to pass the Fugitive Slave Acts (EK 2.20.A.2–3). Leaders and writers in the abolitionist movement (like Frederick Douglass, William Still, and white allies) publicized escapes, documented stories, and pressured public opinion—while conductors such as Harriet Tubman directly led rescues and linked grassroots resistance to national abolitionist goals (EK 2.20.B.1–3). For AP exam prep, connect sources about routes, Fugitive Slave laws, and Tubman’s actions when you explain causation, continuity/change, or use source evidence (see the Topic 2.20 study guide: https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR). For more practice, try Fiveable’s question bank (https://library.fiveable.me/practice/ap-african-american-studies).
What were the consequences of the Fugitive Slave Acts on both enslaved people and free Black people?
The Fugitive Slave Acts (1793, strengthened 1850) made escape far riskier for both freedom-seeking and free Black people. For enslaved people, the laws legalized local seizure and return, raising the chance of capture even in Northern states and pushing many to travel farther—often to Canada or Mexico—to secure safety. For free Black people, the Acts created constant legal vulnerability: slave-catchers and local officials could seize them on flimsy evidence, so many were kidnapped, jailed, or forced into Southern enslavers’ claims. The 1850 law also imposed heavy penalties on anyone who helped runaways, which narrowed safe spaces, forced Underground Railroad networks to go deeper underground, and increased abolitionist resistance (vigilance committees, legal challenges). This topic ties directly to LO 2.20.A and EK 2.20.A.3 in the CED. For more review, check the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) and try practice questions (https://library.fiveable.me/practice/ap-african-american-studies).
I don't understand why only 30,000 people escaped through the Underground Railroad - was it not very successful?
Good question—30,000 might sound small, but it doesn’t mean the Underground Railroad (UGRR) failed. That number (EK 2.20.A.2) is an estimate of documented people who reached freedom through the covert network. Remember a few things from the CED and Topic 2.20: - Scale and danger: escaping was extremely risky. Slaveholders, distance to free territory, limited money or contacts, and the Fugitive Slave Acts (1793, 1850) made successful flight hard. - Not all routes or people were recorded: the UGRR was secretive by design, so many self-emancipations weren’t documented; historians rely on fragmentary sources. - Broader forms of resistance: many enslaved people sought freedom in other ways (running to Union lines during the Civil War, buying freedom, legal suits, everyday resistance). - Impact beyond numbers: the UGRR weakened slavery politically and morally, amplified abolitionist voices, and showed widespread self-emancipation efforts (EK 2.20.A.1, source notes). For exam prep, link this to LO 2.20.A—explain both scale and role, and use the Topic 2.20 study guide (https://library.fiveable.me/ap-african-american-studies/unit-2/20-abolitionism-and-the-underground-railroad/study-guide/pKJA8ozY2at2IfTR) and practice questions (https://library.fiveable.me/practice/ap-african-american-studies) to practice answering DBQ/short-answer prompts about significance vs. scale.