Hear how the world reacted to the American Civil War

View animated battle maps from every major skirmish of the American 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 Civil War turned the Continental Divide into an American symbol of identity

Historians argue that the boundary only became a celebrated American symbol in the 1860s, when Civil War-era leaders promoted a west-east geographic divide to replace the devastating north-south political divide, and that the term's use spiked after the transcontinental railroad crossed it in 1868.

What impact did WWI have on the US civil rights movement?

One of the great hypocrisies in American history involve the expectation of African-Americans to defend liberty in several wars while being deprived of it when they returned home to, as this article puts it "disfranchisement, segregation, debt peonage and racial violence." The writer reflects on World War I and how it affected the fight for civil rights in the USA.

Was the Civil War really about states' rights?

The Civil War was fought over slavery, and Confederate leaders and supporters admitted as much in the build-up to the war and after. But later on, after the South's defeat, the lie of the Lost Cause was pushed—and it persists to this day. This four-minute video details the story of the Lost Cause, "state's rights", Confederate monuments, and the machinations behind them.

Where was the Civil War fought?

The Civil War is commonly described as a war between northern and southern US states, but where was the war actually fought? Watch this interactive map and timeline to see who fought who and when. Click on specific battles to learn more about each fight.

What happened after the Civil War?

After the massive devastation and scorched earth wartime methods of the Civil War, the US entered its Reconstruction era. Listen to this podcast to learn what that entailed and who was affected.

See the army generals who helped define the Civil War

Hear profiles of the Union and Confederate commanders whose choices defined the war's outcome—from Grant and Lee to Sherman, Jackson, and others. See how their actions, tactics, and skills shaped the Civil War.

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

Abraham Lincoln's victory in 1860 sparked Southern secession—even before his inauguration

Abraham Lincoln's election on an antislavery expansion platform convinced many Southerners that their way of life was under threat. Within three months, seven states seceded from the Union—forming the Confederacy—before Lincoln took office in March 1861.

The abolitionist movement long predated the Civil War

Beginning in the late 18th century, abolitionists like Frederick Douglass, William Lloyd Garrison, and Sojourner Truth campaigned through newspapers, lectures, and political action to end slavery.

European powers largely dismissed Monroe's declaration initially

The reaction in Europe ranged from quiet acceptance in Britain to outrage from Austria's Prince Metternich, who privately called it a "new act of revolt." At home, US newspapers reported a "warm and universal burst of applause," and Congress responded positively to the address.

37 maps that explain the American Civil War

This collection of 37 maps tells the story of the American Civil War as well as any historical account. See how and where the war began and why, and where the major battles were fought. Discover how the North achieved victory and the many ways the war changed America forever.

The Emancipation Proclamation shifted the purpose of the war for the Union

Issued on Jan. 1, 1863, the Emancipation Proclamation declared enslaved people in Confederate-held territory free, redefining the Union's cause from merely preserving the nation to abolishing slavery.

The Civil War permanently strengthened federal power

The Civil War expanded federal power through emancipation, national military mobilization, and postwar civil rights laws, permanently strengthening the national government and shifting the balance of authority away from the states.

Abraham Lincoln's election in 1860 triggered a cascade of Southern secessions and the formation of the Confederacy, culminating in the Confederate attack on Fort Sumter in Charleston, South Carolina.

Bills passed during the Civil War shaped postwar America

Despite the war with the South, Congress passed transformative laws like the Homestead Act and the Morrill Land-Grant College Act, which encouraged westward settlement and expanded higher education.

In the midst of the Civil War, Lincoln rapidly expanded presidential power

Abraham Lincoln suspended habeas corpus, expanded the army without congressional approval, and issued the Emancipation Proclamation—despite likely lacking authority to unilaterally alter national slave law. His actions set precedents for expanded presidential power in wartime.

The Civil War introduced many technological advances to both society and warfare.

How Emily Dickinson and Walt Whitman grappled with the American Civil War

Whitman, whose brother was injured while fighting for the Union, was often overt in his pro-Union poems. Dickinson, whose brother paid to have someone enlist under his name, was more subtle, though equally as affected, as this comparative analysis makes clear.

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.

The Civil War was the deadliest conflict in American history

Between 1861 and 1865, an estimated 620,000 to 750,000 soldiers died from battle and disease—more than in all other US wars combined.

Abraham Lincoln received only 40% of the popular vote in the 1860 election, highlighting the deep divisions in the country on the eve of the Civil War.

The Dred Scott decision denied citizenship to people of African descent

In 1857, the Supreme Court ruled in Dred Scott v. Sandford that Black Americans could not be US citizens. The decision heightened an already brewing conflict and became a key factor in pushing the nation toward civil war.

The final shots of the Civil War were fired in the Arctic over 2 months after the South's surrender.

Most Confederate soldiers and leaders after the Civil War were pardoned

After surrender, most Confederate soldiers were pardoned and returned home, while leaders like Jefferson Davis faced short imprisonment. The South came under military occupation, Confederate money became worthless, and many former officers were barred from public office.

Hundreds of women secretly joined the Union and Confederate armies during the war

Hear the story of women who disguised themselves as men to enlist in both Union and Confederate armies—serving as soldiers, medics, and spies.

Explore new and contemporary perspectives with Emerging Civil War

Emerging Civil War brings together historians and writers who offer fresh research, essays, and battlefield stories that uncover overlooked events, people, and places—showing that scholarship on the war is still evolving over 160 years later.

See rare Civil War photographs preserved by the National Archives

The Civil War was the first major American conflict documented by a camera, with its images distributed widely to the public. The National Archives' digital collection offers thousands of original Civil War images: portraits, battlefields, hospitals, and everyday life.

Despite the Juneteenth announcement that they were free, some enslaved people were still held captive.

The Lincoln-Douglas debates sharpened the national divide over slavery

In 1858, Abraham Lincoln and Senator Stephen Douglas debated while competing for an Illinois Senate seat. Their seven debates, reprinted nationwide, brought the question of slavery to the forefront—further polarizing the country and propelling Lincoln to national prominence.

Visualize every day of the American Civil War, in which fighting took place in a majority of the country.

Approximately 180,000 African Americans served in Union forces

About 180,000 Black soldiers—roughly 10% of the Union army—served in the United States Colored Troops after 1863. Despite lower pay and discrimination, they were crucial to the Union victory.

The South built its wealth largely from slave labor

Before the Civil War, the Southern economy relied on roughly 4 million enslaved people producing cash crops such as cotton, rice, and sugarcane. Their forced labor generated immense profits—the South produced 75% of the world's cotton by 1860.

Listen to firsthand accounts of how Black Americans fought to end slavery and shape Reconstruction

This podcast explores the actions of Black Americans who fought for freedom before, during, and after the Civil War—highlighting their key role in abolition and the Reconstruction era.

Hear about why Europe obeyed the Monroe Doctrine, despite American military weakness

This podcast explores the European background of the Monroe Doctrine, highlighting France's efforts to install aristocratic Bourbon monarchs in the newly independent Latin American republics—and how US opposition, British threats, and Spanish resistance ultimately disrupted those plans.

11 states formed the Confederacy, with 2 others claiming allegiance

Between December 1860 and June 1861, 11 Southern states officially seceded to form the Confederacy. Pro-Confederate factions in Missouri and Kentucky also declared secession, but both states remained largely under Union control throughout the war.

Foreign policy and war defined Madison's presidency

During James Madison's presidency, disputes with Britain and France over trade, maritime rights, and impressment dominated foreign policy, culminating in the War of 1812 and shaping how the United States engaged with major European powers.

Congress descended into fistfights, duels, and violence before the Civil War

In the decades before the Civil War, members of the United States Congress carried weapons, assaulted colleagues, and, in one case, a congressman killed another in a duel. The violence was driven largely by sectional conflict over slavery and foreshadowed the nation's descent into war.

Read an annotated 1866 essay by abolitionist Frederick Douglass, where he laid out his vision for reshaping America after the Civil War.

Silent film star Buster Keaton tried to turn the Civil War into a comedy with the 1926 film 'The General,' which was panned by critics for its pro-Confederate themes and tone-deaf treatment of war.

Lincoln's original reconstruction vision prioritized reconciliation

Proposed in 1863, Lincoln's Ten Percent Plan offered lenient readmission for Southern states once 10% of voters pledged loyalty and ended slavery. It was adopted in a few Union-occupied areas but was only partially implemented before his assassination in 1865.

The nullification crisis tested whether states could defy federal law

In the 1830s, South Carolina declared federal tariffs void within its borders. President Andrew Jackson threatened military force, Congress passed a compromise tariff, and the episode ended with federal authority prevailing over state nullification.

The devastation of the American Civil War led to the establishment of Memorial Day

Tracing its origins to the post-Civil War era, Memorial Day began as local tributes to those who lost their lives in the war. Originally taking place annually on May 30, it was moved to the final Monday in May in 1971.

The Declaration of Independence was not only a statement of principles but also an appeal for military allies that the struggling colonists needed to survive.

Later in life, Washington privately grew critical of slavery—while continuing to uphold it publicly

His private letters increasingly described slavery as unjust and incompatible with Republican ideals, and his final will ordered the eventual emancipation of those he legally owned. At the same time, he enforced slave labor, signed pro-slavery laws, and took no public action to dismantle the system.

The Concert of Europe's collapse contributed to World War I

The 19th-century great power system gradually unraveled due to rising nationalism, imperial rivalry, and shifting alliances—leading to its collapse in 1914 and the outbreak of the deadliest war the world had yet seen.

The Kansas-Nebraska Act sparked violence that foreshadowed the Civil War

The 1854 Kansas-Nebraska Act let settlers vote on whether to allow slavery, repealing the Missouri Compromise. Competing proslavery and antislavery groups poured into Kansas, sparking years of bloody conflict known as "Bleeding Kansas."

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.

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.