American Civil War: In the Battle of Campbell's Station, Confederate troops unsuccessfully attack Union forces which allows General Ambrose Burnside to secure Knoxville, Tennessee.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union. The central conflict leading to war was a dispute over whether slavery should be permitted to expand into the western territories, leading to more slave states, or be prohibited from doing so, which many believed would place slavery on a course of ultimate extinction.

The Battle of Campbell's Station saw Confederate forces under Lieutenant General James Longstreet attack Union troops led by Major General Ambrose Burnside at Campbell's Station, Knox County, Tennessee, during the Knoxville Campaign of the American Civil War. Longstreet hoped to crush the Union Army of the Ohio forces before they could retreat to Knoxville. During the fighting, the Confederates forced the Union troops to fall back from five separate positions. However, the final result was that Burnside's troops conducted a successful fighting withdrawal.

The Confederate States of America (CSA), also known as the Confederate States (C.S.), the Confederacy, or the South, was an unrecognized breakaway republic in the Southern United States from 1861 to 1865. It comprised eleven U.S. states that declared secession: South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, Texas, Virginia, Arkansas, Tennessee, and North Carolina. These states fought against the United States during the American Civil War.

The Union was the central government of the United States during the American Civil War. Its civilian and military forces resisted the Confederacy's attempt to secede following the election of Abraham Lincoln as president of the United States. Lincoln's administration asserted the permanency of the federal government and the continuity of the United States Constitution.