American Civil War

American Civil War
Nathaniel Currier and James Merritt Ives · Public domain · source
Name	American Civil War
Date	1861–1865
Place	United States
Result	Union victory; abolition of slavery; Reconstruction
Combatant1	United States
Combatant2	Confederate States of America
Commanders1	Abraham Lincoln, Ulysses S. Grant, William Tecumseh Sherman, George B. McClellan, Philip Sheridan, George G. Meade, Winfield Scott
Commanders2	Jefferson Davis, Robert E. Lee, Stonewall Jackson, James Longstreet, J. E. B. Stuart, Braxton Bragg
Strength1	~2.1 million (enlisted)
Strength2	~1 million (enlisted)
Casualties	~620,000–750,000 dead; ~1.5 million casualties total

American Civil War The American Civil War was a large-scale internal conflict fought in the United States from 1861 to 1865 between the United States (the Union) and the Confederate States of America (the Confederacy). The war transformed political authority, interstate relations, and social structures through campaigns and legislation that included decisive battles, blockades, and the abolition of chattel slavery. It involved major political figures, military leaders, and international reactions that influenced 19th-century geopolitics.

Background and Causes

Tensions over territorial expansion after the Mexican–American War, disputes following the Missouri Compromise and the Compromise of 1850, and the controversy sparked by Uncle Tom's Cabin and the Dred Scott v. Sandford decision heightened sectional divisions. The growth of the Democratic Party and the fracturing of the Whig Party culminated in the rise of the Republican Party and the election of Abraham Lincoln in 1860, provoking secession by states led by South Carolina and joined by Mississippi, Florida, Alabama, Georgia, Louisiana, Texas, Virginia, Arkansas, North Carolina, and Tennessee. Debates over the Fugitive Slave Act, Kansas–Nebraska Act, and the politics of bleeding Kansas made compromise increasingly difficult. Economic differences between the industrializing New England and the agrarian Deep South, exacerbated by disputes over tariff policy and internal improvements, contributed to the rupture.

Major Campaigns and Battles

Opening hostilities began with the Confederate attack on Fort Sumter in April 1861, which prompted widespread mobilization. Early eastern campaigns featured the First Battle of Bull Run, the Peninsula Campaign, and the leadership of George B. McClellan against Robert E. Lee in the Seven Days Battles. The 1862–1863 western campaigns included the Battle of Shiloh, the Vicksburg Campaign under Ulysses S. Grant, and the Union control of the Mississippi River after the fall of Vicksburg. 1863 proved pivotal with the Battle of Gettysburg and the Siege of Vicksburg, followed by the Union victories in the Chattanooga Campaign and the Atlanta campaign led by William Tecumseh Sherman. Sherman's subsequent March to the Sea and the Carolinas Campaign devastated Confederate infrastructure. The 1864–1865 Overland Campaign pitted Grant and George G. Meade against Lee in battles such as Wilderness, Spotsylvania Court House, and Cold Harbor, culminating in the siege of Petersburg and Lee's surrender at Appomattox Court House in 1865. Naval actions, including the Battle of Hampton Roads between USS Monitor and CSS Virginia, and the Union blockade enforced by the United States Navy shaped logistic outcomes.

Political and Home Front Developments

President Lincoln navigated wartime politics amid opposition from the Democratic Party, including the Copperheads and representatives like Clement Vallandigham, while managing relations with generals such as McClellan and Grant. The Confederate government under Jefferson Davis faced challenges with conscription, state rights tensions, and economic strain. Northern mobilization included the Enrollment Act and the use of draft riots such as the New York Draft Riots, while Southern mobilization relied on the Conscription Act and state militias. International diplomacy involved efforts to prevent United Kingdom and France recognition of the Confederacy, disputes around the Trent Affair, and the impact of cotton diplomacy on European policy.

Emancipation, Slavery, and Social Impact

The war accelerated emancipation policies, most notably the Emancipation Proclamation issued by Lincoln after the Battle of Antietam, which declared freedom for enslaved people in rebelling states and enabled enlistment of formerly enslaved soldiers in units like the United States Colored Troops. Abolitionist leaders such as Frederick Douglass and activists in organizations like the American Anti-Slavery Society influenced policy and recruitment. The conflict reshaped African American life through contraband camps, the role of black soldiers at battles like Fort Wagner, and legal changes culminating in the passage of the Thirteenth Amendment. Women such as Clara Barton and Dorothea Dix transformed nursing and humanitarian work, while wartime production and labor shifts affected communities in Pennsylvania, Virginia, Georgia, and elsewhere.

Military Organization and Technology

Both sides organized armies modeled on European systems, with distinctions between volunteer regiments, regulars, and militia units like the 90th Pennsylvania Infantry and the 20th Maine Infantry Regiment. Command structures involved generals from the United States Military Academy at West Point including Lee and Grant. Technological changes included rifled muskets, the widespread use of the Minié ball, trench warfare precursors during the Siege of Petersburg, ironclad warships illustrated by USS Monitor and CSS Virginia, and the use of railroads and telegraph lines for logistics and command. Artillery innovations, the deployment of balloon reconnaissance by pioneers such as Thaddeus Lowe, and evolving cavalry tactics under leaders like J. E. B. Stuart also shaped combat. Medical practices advanced through figures like Jonathan Letterman and institutions such as Satterlee Hospital.

Aftermath and Reconstruction

The Confederate surrender led to federal policies for reunification and rights enforcement during the Reconstruction era, including legislation such as the Civil Rights Act of 1866 and the passage of the Fourteenth Amendment and Fifteenth Amendment. Presidential and congressional disputes involved Andrew Johnson and the Radical Republicans, producing Reconstruction Acts and military governance in former Confederate states like South Carolina and Louisiana. The postwar era dealt with veterans' affairs through organizations like the Grand Army of the Republic, memorialization at sites like Gettysburg National Military Park, and debates over sharecropping and the Southern economy in states such as Mississippi and Alabama. Reconstruction ended with the Compromise of 1877, which resulted in federal withdrawal from the South and ushered in the era of Jim Crow laws and sustained struggles for civil rights.

Category:19th-century conflicts