Secession
Election, conventions, Sumter, and the creation of two war capitals.
Milestones in order. This is history, not a weekly activity grid.
- Lincoln elected
- Sumter
- Antietam
- Emancipation Proclamation
- Gettysburg and Vicksburg
- Gettysburg Address
- Grant vs Lee; Atlanta
- Appomattox
- Lincoln shot
- Compromise of 1877
Darker cells mean a higher score for this topic on that metric.
Scale42
Intensity80
Duration40
Tech shift52
Political impact76
Cultural memory85
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Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Are the scores a ranking of nations or armies?
No. Scores are browsing aids inside an era-bounded atlas — not live league tables of countries.
How many died?
About 620,000 was the long-standard military estimate; recent work (Hacker and others) suggests around 750,000, with a published band reaching about 850,000 when some civilian deaths are considered. Disease killed more than combat.
Was it about slavery?
Yes, as the cause of secession. Lincoln's initial public aim was union; emancipation became a war aim in 1862-63. Both facts are true and in sequence.
Why did the Union win?
Population, industry, rail, naval blockade, Black manpower, and -- in 1864-65 -- a coordinated strategy under Grant. Confederate advantages in interior lines and military culture were real and insufficient.
What was Gettysburg?
A three-day battle in Pennsylvania (1-3 July 1863) that ended Lee's second northern invasion. Combined with Vicksburg's fall on 4 July, it was the war's political-military hinge -- not the last fighting.
What did Reconstruction do?
It briefly empowered Black voters and Republican governments in the South, passed the 14th and 15th Amendments, and then collapsed under violence and northern fatigue after 1877.
The war's fuse was a decade of statute and violence: Kansas, Dred Scott, John Brown, the 1860 split of the Democratic Party.
Calling it "the War Between the States" is itself a Lost Cause naming. This page uses the US legal name: a civil war against a rebellion.
Timeline
- Lincoln elected
A sectional president; secession conventions begin in December.
- Sumter
Confederate batteries open; Lincoln calls for volunteers; the upper South secedes.
- Antietam
Bloodiest single day; the preliminary emancipation proclamation follows.
- Emancipation Proclamation
Freedom as Union policy in rebel areas; USCT recruitment expands.
- Gettysburg and Vicksburg
Lee retreats from Pennsylvania; the Mississippi is taken on 4 July.
- Gettysburg Address
Lincoln's short speech reframes the war as a new birth of freedom.
- Grant vs Lee; Atlanta
Overland Campaign attrition; Sherman takes Atlanta in September -- a political gift to Lincoln's re-election.
- Appomattox
Lee surrenders to Grant; generous terms become part of the reunion myth and a real mercy.
- Lincoln shot
Booth's assassination at Ford's Theatre; Reconstruction loses its most flexible politician.
- Compromise of 1877
Federal troops leave the South; Reconstruction ends as a national project.
Eras
Improvised armies
Bull Run, the Peninsula, Shiloh, Antietam -- learning industrial war.
Emancipation year
Proclamation, USCT, Gettysburg, Vicksburg, Chattanooga.
Hard war
Grant, Sherman, Petersburg siege, Appomattox, assassination.
Reconstruction
Amendments, Freedmen's Bureau, terror, and the 1877 retreat.
Milestones
Emancipation as strategy
A moral and military decision that recast foreign and domestic politics.
Amendments 13-15
The legal second founding -- later gutted, later revived.
Industrial mobilisation
Rail, telegraph, and factories as Union weapons.
Appomattox ended field armies, not the political war over Black citizenship.
Recent death-toll revisions (toward ~750,000) should be stated as a range, not a new false precision.