Battle of Chickamauga
Overview
 
The Battle of Chickamauga, fought September 19–20, 1863, marked the end of a Union
Union Army
The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army...

 offensive in southeastern Tennessee
Tennessee
Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...

 and northwestern Georgia
Georgia (U.S. state)
Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...

 called the Chickamauga Campaign. The battle was the most significant Union defeat in the Western Theater
Western Theater of the American Civil War
This article presents an overview of major military and naval operations in the Western Theater of the American Civil War.-Theater of operations:...

 of the American Civil War
American Civil War
The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

 and involved the second highest number of casualties in the war following the Battle of Gettysburg
Battle of Gettysburg
The Battle of Gettysburg , was fought July 1–3, 1863, in and around the town of Gettysburg, Pennsylvania. The battle with the largest number of casualties in the American Civil War, it is often described as the war's turning point. Union Maj. Gen. George Gordon Meade's Army of the Potomac...

.

The battle was fought between the Union Army of the Cumberland
Army of the Cumberland
The Army of the Cumberland was one of the principal Union armies in the Western Theater during the American Civil War. It was originally known as the Army of the Ohio.-History:...

 under Maj. Gen.
Major general (United States)
In the United States Army, United States Marine Corps, and United States Air Force, major general is a two-star general-officer rank, with the pay grade of O-8. Major general ranks above brigadier general and below lieutenant general...

 William Rosecrans
William Rosecrans
William Starke Rosecrans was an inventor, coal-oil company executive, diplomat, politician, and United States Army officer. He gained fame for his role as a Union general during the American Civil War...

 and the Confederate
Confederate States Army
The Confederate States Army was the army of the Confederate States of America while the Confederacy existed during the American Civil War. On February 8, 1861, delegates from the seven Deep South states which had already declared their secession from the United States of America adopted the...

 Army of Tennessee
Army of Tennessee
The Army of Tennessee was the principal Confederate army operating between the Appalachian Mountains and the Mississippi River during the American Civil War. It was formed in late 1862 and fought until the end of the war in 1865, participating in most of the significant battles in the Western Theater...

 under Gen. Braxton Bragg
Braxton Bragg
Braxton Bragg was a career United States Army officer, and then a general in the Confederate States Army—a principal commander in the Western Theater of the American Civil War and later the military adviser to Confederate President Jefferson Davis.Bragg, a native of North Carolina, was...

, and was named for West Chickamauga Creek, which meanders near the battle area in northwest Georgia (and ultimately flows into the Tennessee River
Tennessee River
The Tennessee River is the largest tributary of the Ohio River. It is approximately 652 miles long and is located in the southeastern United States in the Tennessee Valley. The river was once popularly known as the Cherokee River, among other names...

 about 3.5 miles (5.6 km) northeast of downtown Chattanooga
Chattanooga, Tennessee
Chattanooga is the fourth-largest city in the US state of Tennessee , with a population of 169,887. It is the seat of Hamilton County...

).

After his successful Tullahoma Campaign
Tullahoma Campaign
The Tullahoma Campaign or Middle Tennessee Campaign was fought between June 24 and July 3, 1863, during the American Civil War. The Union Army of the Cumberland, commanded by Maj. Gen. William S...

, Rosecrans renewed the offensive, aiming to force the Confederates out of Chattanooga.
 
x
OK