Question: What rank was Nathan Bedford Forrest of the Chickamauga campaign?

Context paragraphs:
Nathan Bedford Forrest III: Nathan Bedford Forrest III (April 7, 1905 – June 13, 1943) was a brigadier general of the United States Army Air Forces, and a great-grandson of Confederate general Nathan Bedford Forrest.  He was killed in action in Germany during World War II.  Forrest was the first American general to be killed in action during the war in Europe.

Nathan Bedford Forrest II: Nathan Bedford Forrest II (August 1871 – March 11, 1931) was the Grand Dragon of the Ku Klux Klan for Georgia.  He was also the Commander-in-Chief of the Sons of Confederate Veterans from 1919 to 1921.  Nathan Bedford Forrest II was the grandson of Confederate Lieutenant-General Nathan Bedford Forrest.

Failure in the Saddle: Failure in the Saddle: Nathan Bedford Forrest, Joseph Wheeler, and the Confederate Cavalry in the Chickamauga Campaign is a book written by Virginia Military Institute graduate David A. Powell, and published by Savas Beatie, analyzing the failures of Nathan Bedford Forrest and Joseph Wheeler in the American Civil War.  Powell draws upon firsthand accounts, many previously unpublished, to offer a detailed examination of the Southern cavalry’s role in the Chickamauga campaign.

Battle of Johnsonville: The Battle of Johnsonville was fought November 4–5, 1864, in Benton County, Tennessee and Humphreys County, Tennessee, during the American Civil War.  Confederate cavalry commander Major General Nathan Bedford Forrest culminated a 23-day raid through western Tennessee by attacking the Union supply base at Johnsonville.  Forrest's attack destroyed numerous boats in the Tennessee River and millions of dollars of supplies, disrupting the logistical operations of Union Major General George H. Thomas in Nashville.  As a result, Thomas's army was hampered in its (eventually successful) plan to defeat Confederate Lieutenant General John Bell Hood's invasion of Tennessee, the Franklin-Nashville Campaign.

Forrest School (Chapel Hill, Tennessee): Forrest School is a public school in Chapel Hill, Tennessee.  It serves grades 7-12 and is part of the Marshall County School District.  The school is also known as Forrest Middle School for grades 7-8 and Forrest High School for grades 9-12.  It is named for Nathan Bedford Forrest, a Confederate general and first Grand Wizard of the Ku Klux Klan, who was born in Chapel Hill.

Westside High School (Jacksonville): Westside High School is a public high school in Jacksonville, Florida.  It is part of the Duval County School District and serves Jacksonville's Westside.  The school was established in 1959 and was originally named Nathan B. Forrest High School, after Nathan Bedford Forrest, a Confederate general and first Grand Wizard of the Ku Klux Klan.  The fact that the school was named for Forrest was a point of significant controversy until the Duval County School Board changed the name in 2014.

Forrest's Cavalry Corps: Forrest's Cavalry Corps was part of the Confederate States Army during the American Civil War and commanded by Lieutenant General Nathan Bedford Forrest.  Formed during the summer of 1862, it took part in the various battles in the Western Theater during the second half of the war.  At first serving as part of the Army of Tennessee, both Forrest and the corps were then transferred to northern Mississippi and often launched independent raids into Union occupied western and central Tennessee.

Nathan Bedford Forrest: Nathan Bedford Forrest (July 13, 1821 – October 29, 1877), called Bedford Forrest in his lifetime, was a lieutenant general in the Confederate Army during the American Civil War.

I'll Fly Away (TV series): I'll Fly Away is an American drama television series set during the late 1950s and early 1960s, in an unspecified Southern U.S. state.  It aired on NBC from 1991 to 1993 and starred Regina Taylor as Lilly Harper, a black housekeeper for the family of district attorney Forrest Bedford (Sam Waterston), who was named after the controversial Confederate Army leader Nathan Bedford Forrest (1821-1877).  As the show progressed, Lilly became increasingly involved in the Civil Rights Movement, which eventually drew in Forrest, as well.

Eva, Tennessee: Eva is an unincorporated community and census-designated place (CDP) in Benton County, Tennessee, United States, on the western shore of the Kentucky Lake impoundment of the Tennessee River.  It is the site of Nathan Bedford Forrest State Park.  As of the 2010 census, its population was 293.  The ZIP Code Tabulation Area for the ZIP code (38333) that serves Eva had a population of 574 as of the 2000 U.S. Census, when Eva was not yet a CDP.  Eva is centered on the junction of State Route 191, which connects the community to Nathan Bedford Forrest State Park to the north and the town of Camden to the south, and Eva Beach Road, which stretches from the center of the community to its beach along Kentucky Lake.

Supporting paragraphs: Failure in the Saddle Nathan Bedford Forrest
Answer: lieutenant general