The American Civil War and Reconstruction (1861–1877)
The American Civil War (1861–1865) was the costliest and most transformative conflict in United States history. Roughly 750,000 soldiers died — more than the combined US toll of all later wars — and four million enslaved African-Americans were freed. The constitutional revolution of Emancipation, the Thirteenth, Fourteenth and Fifteenth Amendments, and the contested Reconstruction (1865–1877) redefined American citizenship.
The unilateral withdrawal of a state from the federal Union. Eleven slave states attempted to secede between December 1860 and June 1861, forming the Confederate States of America. The constitutional question of whether secession was lawful was answered decisively by force; the Supreme Court confirmed the negative in Texas v. White (1869).
Antebellum tensions (1820–1860)
Sectional conflict over slavery ran like a fault line through American political life. Major flashpoints included:
| Year | Event | Significance |
|---|---|---|
| 1820 | Missouri Compromise | Maine free, Missouri slave; slavery north of 36°30' banned |
| 1832 | Nullification Crisis | South Carolina under Calhoun defies Jackson over tariffs |
| 1846 | Wilmot Proviso | Failed bid to ban slavery in lands taken from Mexico |
| 1850 | Compromise of 1850 | California free; new Fugitive Slave Act |
| 1852 | Uncle Tom's Cabin | Stowe's novel galvanises Northern opinion |
| 1854 | Kansas-Nebraska Act | Popular sovereignty; "Bleeding Kansas" |
| 1857 | Dred Scott v. Sandford | Court denies Black citizenship; voids Missouri Compromise |
| 1859 | John Brown's raid on Harpers Ferry | Attempt to spark slave revolt |
| 1860 | Lincoln elected President (6 Nov) | Wins without a single Southern electoral vote |
Secession and outbreak (1860–1861)
South Carolina seceded on 20 December 1860, followed by Mississippi (9 Jan), Florida (10 Jan), Alabama (11 Jan), Georgia (19 Jan), Louisiana (26 Jan) and Texas (1 Feb). The Confederate States of America was organised at Montgomery, Alabama, on 4 February 1861, electing Jefferson Davis president. After the war began, Virginia, Arkansas, Tennessee, and North Carolina also seceded, bringing the total to eleven.
Abraham Lincoln was inaugurated as the 16th president on 4 March 1861. Six weeks later Confederate batteries opened fire on Fort Sumter, Charleston, on 12 April 1861 — the war's opening shots.
The war (1861–1865)
| Year | Eastern Theatre | Western Theatre |
|---|---|---|
| 1861 | First Battle of Bull Run (21 Jul); Union defeat | Missouri operations |
| 1862 | Peninsular Campaign; Antietam (17 Sep) | Shiloh (Apr); fall of New Orleans (Apr) |
| 1863 | Chancellorsville (May); Gettysburg (1–3 Jul) | Vicksburg surrenders (4 Jul) |
| 1864 | Wilderness; Spotsylvania; Cold Harbor; Petersburg siege | Atlanta falls (2 Sep); March to the Sea |
| 1865 | Lee surrenders at Appomattox (9 Apr) | Joseph Johnston surrenders (26 Apr) |
Key engagements
- Battle of Antietam (17 September 1862) — the single bloodiest day in American history; about 22,000 casualties. Lee's first invasion of the North stopped. Lincoln used the strategic victory to issue the Preliminary Emancipation Proclamation five days later.
- Battle of Gettysburg (1–3 July 1863) — about 51,000 casualties; Pickett's Charge repulsed. Lee retreats permanently. Lincoln dedicates the cemetery with the Gettysburg Address (19 November 1863).
- Vicksburg (4 July 1863) — Grant's siege gives the Union the Mississippi.
- Sherman's March to the Sea (15 Nov – 21 Dec 1864) — Atlanta to Savannah; total war against Confederate logistics.
- Surrender at Appomattox Court House (9 April 1865) — Lee surrenders the Army of Northern Virginia to Grant.
Emancipation
The Emancipation Proclamation of 1 January 1863 declared free all slaves in Confederate-held territory. Its limitations were intentional (the border states and Union-occupied areas were exempt), but it reframed the war as one for freedom and authorised the recruitment of African-American soldiers. Some 180,000 Black soldiers and sailors served in the Union forces.
The Thirteenth Amendment, abolishing slavery throughout the United States, was passed by Congress on 31 January 1865 and ratified on 6 December 1865.
- 20 December 1860 — South Carolina secedes.
- 12 April 1861 — Confederate attack on Fort Sumter.
- 22 September 1862 — Preliminary Emancipation Proclamation.
- 1–3 July 1863 — Gettysburg; 4 July — Vicksburg falls.
- 19 November 1863 — Gettysburg Address.
- 9 April 1865 — Lee surrenders at Appomattox.
- 14 April 1865 — Lincoln shot; dies 15 April.
- 6 December 1865 — Thirteenth Amendment ratified.
- 9 July 1868 — Fourteenth Amendment ratified.
- 3 February 1870 — Fifteenth Amendment ratified.
Assassination of Lincoln
On 14 April 1865 (Good Friday) at Ford's Theatre in Washington, the actor John Wilkes Booth shot Lincoln, who died the next morning. Booth was hunted down and killed on 26 April; four co-conspirators were hanged on 7 July 1865. Vice-President Andrew Johnson, a War Democrat from Tennessee, became the 17th president.
Reconstruction (1865–1877)
Reconstruction sought to reintegrate the seceded states, define the legal status of freed people, and rebuild the South. It passed through phases:
1. Presidential Reconstruction (1865–67)
Johnson's lenient terms allowed former Confederates to dominate the new Southern legislatures, which passed restrictive Black Codes (1865–66). Congress overrode the President to pass the Civil Rights Act of 1866 and the Fourteenth Amendment (proposed June 1866, ratified 9 July 1868), which guaranteed birthright citizenship, equal protection, and due process.
2. Congressional / Radical Reconstruction (1867–1877)
The Reconstruction Acts of 1867 placed the ten unreconstructed states under five military districts and required ratification of the Fourteenth Amendment and Black male suffrage. Johnson was impeached by the House on 24 February 1868 and acquitted by one vote in the Senate (16 May 1868). Ulysses S. Grant was elected the 18th president (1869–77).
The Fifteenth Amendment, prohibiting denial of the vote on grounds of race, color or previous condition of servitude, was ratified on 3 February 1870. The Freedmen's Bureau (1865–72) provided education and emergency relief; HBCUs (historically Black colleges and universities) like Howard, Fisk and Hampton were founded in this era.
3. Redemption and the end of Reconstruction
White-supremacist violence (Ku Klux Klan founded 1865; suppressed by the Enforcement Acts of 1870–71) and economic depression (after the Panic of 1873) eroded Northern political will. The Compromise of 1877, settling the disputed 1876 election, made Rutherford B. Hayes president in exchange for the withdrawal of federal troops from the South. By 1877 white "Redeemer" Democrats controlled all eleven former Confederate states; the Jim Crow era of segregation and disenfranchisement, sealed by Plessy v. Ferguson in 1896, would last another seventy years.
For FPSC, anchor on 1861 (war begins), 1863 (Emancipation, Gettysburg, Vicksburg), 1865 (Appomattox, Lincoln assassinated, 13th Amendment), 1868 (14th Amendment), 1870 (15th Amendment), 1877 (Reconstruction ends). The three "Reconstruction Amendments" — 13, 14, 15 — form a triad worth memorising in detail.
Legacy
The Civil War abolished slavery, settled the federal-state balance in favour of the national government, and made citizenship a national rather than a state right. Yet the failure of Reconstruction to secure meaningful Black political and economic equality bequeathed a century of segregation. The constitutional gains — particularly the Fourteenth Amendment's equal-protection clause — would not be vindicated until the civil rights movement of the 1950s and 60s, but they were already on the statute book by 1870.