World-changing1861 – 1865 · 4 years
American Civil War
United States · Virginia · Georgia · Tennessee
Brother killed brother for four years as the Industrial North defeated the agrarian South, ending slavery but costing 600,000 lives.
Estimated casualties
620K – 750Kestimated dead
HEADLINE750K — the single figure used on the map
Earlier estimates ~360k; revised estimates 620-750k. Includes battle deaths, accidents, disease.
SOURCEWikipedia: American Civil War casualties; Hacker et al. (2011)
What happened
Southern secession (1861) triggered civil war when Lincoln refused to surrender federal forts. The North's industrial capacity and manpower eventually overpowered the South's military genius and cotton wealth. Early Confederate victories (Fort Sumter, Bull Run) gave way to grinding attrition. Sherman's march (1864-1865) devastated Georgia and the Carolinas. Total war—targeting civilians and infrastructure—became doctrine. Grant's tenacity and Sherman's tactics broke Southern resistance. Lee surrendered April 1865. Approximately 620,000 soldiers died; civilian deaths from disease and starvation added to the toll.
Why it mattered
The Civil War established federal supremacy over states' rights and abolished slavery via constitutional amendment. It accelerated American industrialization and telegraph-based coordination. The trauma of Reconstruction (1865-1877) and its reversal shaped racial inequality for a century. The Civil War remains America's defining conflict; its unresolved grievances (monuments, Lost Cause mythology, regional identity) persist today. The conflict demonstrated that modern industrial warfare could annihilate entire armies.
Belligerents2
- United States
- Confederate States of America
Conflict graph
SUB-CONFLICTS · 371
- Battle of Aquia Creek1861
- Battle of Balls Bluff1861
- Battle of Barbourville1861
- Battle of Belmont, Missouri1861
- Battle of Big Bethel1861
- Battle of Bird Creek1861
- Battle of Blackburns Ford1861
- Blue Mills Landing1861
- Battle of Boonville1861
- Battle of Bull Run1861
- Battle of Camp Allegheny1861
- Battle of Camp Wild Cat1861
+ 359 more in the atlas.
Sources
- Wikipedia: American Civil War
- Encyclopedia Britannica
- Wikipedia — text reused under CC BY-SA 4.0
Open in the atlas →Seeks the timeline to 1861 and opens this record.
Cite as: American Civil War (1861 – 1865). War Atlas. https://waratlas.org/c/us-civil-war · Sources & methodology