American Civil War

American Civil War
Clockwise from top: Battle of Gettysburg Union Captain John Tidball's artillery Confederate prisoners ironclad USS Atlanta Ruins of Richmond, Virginia Battle of Franklin
Date April 12, 1861 – May 26, 1865[a][1][2] (4 years, 1 month and 2 weeks) Location United States, Atlantic Ocean Result Union victory Abolition of slavery in the United States Beginning of the Reconstruction era Passage of the Reconstruction Amendments Territorial changes Dissolution of the Confederate States of America
Belligerents
United States	Confederate States
Commanders and leaders
Abraham Lincoln X Ulysses S. Grant and others...	Jefferson Davis  Robert E. Lee  and others...
Strength
2,200,000[b] 698,000 (peak)[3][4]	750,000–1,000,000[b][5] 360,000 (peak)[3][6]
Casualties and losses
110,000+  †/ (DOW) 230,000+ accident/disease deaths[7][8] 25,000–30,000 died in Confederate prisons[3][7] 365,000+ total dead[9] 282,000+ wounded[8] 181,193 captured[3][better source needed][c] Total: 828,000+ casualties	94,000+  †/ (DOW)[7] 26,000–31,000 died in Union prisons[8] 290,000+ total dead 137,000+ wounded 436,658 captured[3][better source needed][d] Total: 864,000+ casualties
50,000 free civilians dead[10] 80,000+ slaves dead (disease)[11] Total: 616,222[12]–1,000,000+ dead[13][14]

This article is part of a series on the
History of the United States
Timeline and periods Prehistoric and Pre-Columbian Era until 1607 Colonial Era 1607–1765 1776–1789     American Revolution 1765–1783     Confederation Period 1783–1788 1789–1849     Federalist Era 1788–1801     Jeffersonian Era 1801–1817     Era of Good Feelings 1817–1825     Jacksonian Era 1825–1849 1849–1865     Civil War Era 1849–1865 1865–1917     Reconstruction Era 1865–1877     Gilded Age 1877–1896     Progressive Era 1896–1917 1917–1945     World War I 1917–1918     Roaring Twenties 1918–1929     Great Depression 1929–1941     World War II 1941–1945 1945–1964     Post-World War II Era 1945–1964     Civil Rights Era 1954–1968 1964–1980     Civil Rights Era 1954–1968     Vietnam War 1964–1975 1980–1991     Reagan Era 1981–1991 1991–2008     Post-Cold War Era 1991–2008 2008–present     Modern Era 2008–present
Topics American Century Antisemitism Cultural Cinema Music Newspapers Sports Demography Immigration Economy Banking Education Higher education Flag Government Abortion Capital punishment Civil rights Corruption The Constitution Debt ceiling Direct democracy Foreign policy Law enforcement Postal service Taxation Voting rights Journalism Merchant Marine Military Army Marine Corps Navy Air Force Space Force Coast Guard Party Systems First Second Third Fourth Fifth Sixth Religion Social class Slavery Sexual slavery Technology and industry Agriculture Labor Lumber Medicine Railway
Groups African American Asian American Chinese American Filipino American Indian American Japanese American Korean American Thai American Vietnamese American European American Albanian American English American Estonian American Finnish American German American Irish American Italian American Lithuanian American Polish American Serbian American Hispanic and Latino American Mexican American Jewish American Middle Eastern American Egyptian American Iranian American Iraqi American Lebanese American Palestinian American Saudi American Native Americans Cherokee Comanche Women LGBT Gay men Lesbians Transgender people
Places Territorial evolution Admission to the Union Historic regions American frontier Manifest destiny Indian removal Regions New England The South The West Coast States AL AL AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY Territories DC AS GU MP PR VI Cities Urban history Cities
Outline List of years Historiography Category Portal
v t e

The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States between the Union^[e] ("the North") and the Confederacy ("the South"), which had been formed by states that had seceded from the Union. The cause of the war was the dispute over whether slavery would be permitted to expand into the western territories, leading to more slave states, or be prevented from doing so, which many believed would place slavery on a course of ultimate extinction.

Decades of political controversy over slavery were brought to a head by the victory in the 1860 U.S. presidential election of Abraham Lincoln, who opposed slavery's expansion into the western territories. Seven southern slave states responded to Lincoln's victory by seceding from the United States and forming the Confederacy. The Confederacy seized U.S. forts and other federal assets within their borders. Four more southern states seceded after the war began and, led by Confederate President Jefferson Davis, the Confederacy asserted control over about a third of the U.S. population in eleven states. Four years of intense combat, mostly in the South, ensued.

During 1861–1862 in the Western Theater, the Union made significant permanent gains—though in the Eastern Theater the conflict was inconclusive. The abolition of slavery became a Union war goal on January 1, 1863, when Lincoln issued the Emancipation Proclamation, which declared all slaves in rebel states to be free, which applied to more than 3.5 million of the 4 million enslaved people in the country. To the west, the Union first destroyed the Confederacy's river navy by the summer of 1862, then much of its western armies, and later seized New Orleans. The successful 1863 Union siege of Vicksburg split the Confederacy in two at the Mississippi River. In 1863, Confederate General Robert E. Lee's incursion north ended at the Battle of Gettysburg. Western successes led to General Ulysses S. Grant's command of all Union armies in 1864. Inflicting an ever-tightening naval blockade of Confederate ports, the Union marshaled resources and manpower to attack the Confederacy from all directions. This led to the fall of Atlanta in 1864 to Union General William Tecumseh Sherman, followed by his March to the Sea. The last significant battles raged around the ten-month Siege of Petersburg, gateway to the Confederate capital of Richmond. The Confederates abandoned Richmond, and on April 9, 1865, Lee surrendered to Grant following the Battle of Appomattox Court House, setting in motion the end of the war.

A wave of Confederate surrenders followed. On April 14, just five days after Lee's surrender, Lincoln was assassinated. On May 26, the last military department of the Confederacy, the Department of the Trans-Mississippi, effectively surrendered, but the conclusion of the American Civil War lacks a clear end date, and Appomattox is often symbolically referred to. Small confederate ground forces continued surrendering past the May 26 surrender date until June 23. By the end of the war, much of the South's infrastructure was destroyed, especially its railroads. The Confederacy collapsed, slavery was abolished, and four million enslaved black people were freed. The war-torn nation then entered the Reconstruction era in an attempt to rebuild the country, bring the former Confederate states back into the United States, and grant civil rights to freed slaves.

The Civil War is one of the most extensively studied and written about episodes in U.S. history. It remains the subject of cultural and historiographical debate. Of particular interest is the persisting myth of the Lost Cause of the Confederacy. The American Civil War was among the first wars to use industrial warfare. Railroads, the telegraph, steamships, the ironclad warship, and mass-produced weapons were all widely used during the war. In total, the war left between 620,000 and 750,000 soldiers dead, along with an undetermined number of civilian casualties, making the Civil War the deadliest military conflict in American history.^[f] The technology and brutality of the Civil War foreshadowed the coming World Wars.

Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).