Tennessee in the American Civil War in the context of "Tennessee River"

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.

With Abraham Lincoln's election as President of the United States in 1860, eleven southern states believed their slavery-dependent plantation economies were threatened, and seven initially seceded from the United States. The Confederacy was formed on February 8, 1861, by South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas. They adopted a new constitution establishing a confederation government of "sovereign and independent states". The federal government in Washington D.C. and states under its control were known as the Union.

In the American Civil War (1861–65), the border states or the Border South were four, later five, slave states in the Upper South that primarily supported the Union. They were Delaware, Maryland, Kentucky, and Missouri, and after 1863, the new state of West Virginia. To their north they bordered free states of the Union, and all but Delaware bordered slave states of the Confederacy to their south.

Of the 34 U.S. states in 1861, nineteen were free states and fifteen were slave including the four border states; each of the latter held a comparatively low percentage of slaves. Delaware never declared for secession. Maryland was largely prevented from seceding by local unionists and federal troops. Two others, Kentucky and Missouri, saw rival governments, though their territory mostly stayed in Union control after 1862. Four others did not declare for secession until after the Battle of Fort Sumter and were briefly considered border states: Arkansas, North Carolina, Tennessee, and Virginia. They are called the Upper South, in contrast to the Deep South. A new border state was created during the war, West Virginia, which was formed from 50 counties of Virginia and became a new slave state in the Union in 1863 (with, initially, gradual abolition law).

During the American Civil War, North Carolina joined the Confederacy with some reluctance, mainly due to the presence of Southern Unionistsentiment within the state. A popular vote in February, 1861 on the issue of secession was won by the unionists but not by a wide margin.

This slight lean in favor of staying in the Union would shift towards the Confederacy in response to Abraham Lincoln's April 15 proclamation that requested 75,000 troops from all Union states, leading to North Carolina's secession. Similar to Arkansas, Tennessee, and Virginia, North Carolina wished to remain uninvolved in the likely war but felt forced to pick a side by the proclamation. Throughout the war, North Carolina widely remained a divided state. The population within the Appalachian Mountains in the western part of the state contained large pockets of Unionism. Even so, North Carolina would help contribute a significant amount of troops to the Confederacy, and channeled many vital supplies through the major port of Wilmington, in defiance of the Union blockade.

Knoxville is a city in Knox County, Tennessee, United States, and its county seat. Located on the Tennessee River within the Appalachian Mountains, it is the largest city in the Grand Division of East Tennessee. Knoxville had a population of 190,740 at the 2020 census, making it the third-most populous city in Tennessee. The Knoxville metropolitan area has an estimated 958,000 residents.

Settled in 1786, Knoxville was the first capital of Tennessee. The city struggled with geographic isolation throughout the early 19th century before the arrival of the railroad in 1855 led to an economic boom. The city was bitterly divided over the issue of secession during the American Civil War and was occupied alternately by the Confederate and Union armies, which culminated in the Battle of Fort Sanders in 1863. Following the war, Knoxville grew rapidly and became a major wholesaling and manufacturing center until the 1920s when the city's economy began to stagnate. During the Great Depression, Knoxville's manufacturing sector collapsed, the downtown area declined, and city leaders became entrenched in highly partisan political fights. Hosting the 1982 World's Fair helped reinvigorate the city, and revitalization initiatives by city leaders and private developers have spurred growth in the city, especially downtown.