Secession, slavery, emancipation and the survival of the United States between 1861 and 1865.
The American Civil War began when slaveholding states seceded after Abraham Lincoln's election. Slavery was the central cause articulated in secession documents, though participants also fought over union, sovereignty and survival.
Union victory preserved the United States and enabled constitutional abolition. The failure to protect Reconstruction left racial terror and inequality entrenched.
Republican opposition to slavery's expansion convinced southern elites that their political system was threatened. Claims about states' rights defended a social order built on enslavement.
Both sides mobilised large armies and resources. Enslaved people fled to Union lines, forced policy change and joined the armed forces; emancipation became a central war aim.
Railways, telegraphs, mass armies and entrenchment increased scale without making older tactics irrelevant. Civilian economies and landscapes became military targets.
The Thirteenth, Fourteenth and Fifteenth Amendments transformed law. Federal retreat and white supremacist violence destroyed many gains while Black communities built institutions and political traditions.
Secession followed Lincoln's election.
Confederate bombardment began open war.
Freedom became an explicit Union war policy in rebelling areas.
Union forces stopped Lee's invasion.
Lee surrendered the Army of Northern Virginia.
Slavery was abolished except as punishment for crime.
Federal retreat accelerated the destruction of Black political rights.
Why did slaveholding states secede?
How did enslaved people change Union policy?
Was Reconstruction an unfinished revolution?
Begin with the foundations, then move into the events, people and debates that add detail and complexity.
.jpg?width=1400)
MediumBuild a secure chronological foundation in American Civil War through ten sourced questions and teaching explanations.
Start quiz →
MediumConnect causes, consequences and historical interpretation across the essential American Civil War guide.
Start quiz →