Question: What war was the Battle of Jackson, in the state where the film O Brother, Where Art Thou is set, a part of?

full_context: Document 1: Song of the South: The film is set on a plantation in the southern United States, specifically in the state of Georgia, some distance from Atlanta. Although sometimes misinterpreted as taking place before the U.S. Civil War while slavery was still legal in the region, the film takes place during the Reconstruction Era after slavery was abolished. Harris' original Uncle Remus stories were all set after the American Civil War and the abolition of slavery. Harris himself, born in 1848, was a racial reconciliation activist writer and journalist of the Reconstruction Era. The film makes several indirect references to the Reconstruction Era: clothing is in the newer late - Victorian style; Uncle Remus is free to leave the plantation at will; black field hands are sharecroppers, etc.
Document 2: Battle of Atlanta: The Battle of Atlanta was a battle of the Atlanta Campaign fought during the American Civil War on July 22, 1864, just southeast of Atlanta, Georgia. Continuing their summer campaign to seize the important rail and supply center of Atlanta, Union forces commanded by William Tecumseh Sherman overwhelmed and defeated Confederate forces defending the city under John Bell Hood. Union Maj. Gen. James B. McPherson was killed during the battle. Despite the implication of finality in its name, the battle occurred midway through the campaign, and the city did not fall until September 2, 1864, after a Union siege and various attempts to seize railroads and supply lines leading to Atlanta. After taking the city, Sherman's troops headed south - southeastward toward Milledgeville, the state capital, and on to Savannah with the March to the Sea.
Document 3: Battle of Hatchie's Bridge: The Battle of Hatchie's Bridge, also known as Battle of Davis Bridge or Matamora, was fought on October 5, 1862, in Hardeman County and McNairy County, Tennessee, as the final engagement of the Iuka–Corinth Campaign of the American Civil War. Confederate Major General Earl Van Dorn's army successfully evaded capture by the Union Army, following his defeat at the Battle of Corinth.
Document 4: Battle of Peachtree Creek: The Battle of Peachtree Creek was fought in Georgia on July 20, 1864, as part of the Atlanta Campaign in the American Civil War. It was the first major attack by Lt. Gen. John Bell Hood since taking command of the Confederate Army of Tennessee. The attack was against Maj. Gen. William T. Sherman's Union army which was perched on the doorstep of Atlanta. The main armies in the conflict were the Union Army of the Cumberland, commanded by Maj. Gen. George Henry Thomas and two corps of the Confederate Army of Tennessee.
Document 5: Ulysses S. Grant and the American Civil War: Grant trained Union military recruits and was promoted to Colonel in June 1861. Maj. Gen. John C. Frémont, who viewed in Grant an ``iron will ''to win, appointed Grant to commander of the District of Cairo. Grant became famous around the nation after capturing Fort Donelson in February 1862 and was promoted to Major General by President Abraham Lincoln. After a series of decisive yet costly battles and victories at Shiloh, Vicksburg, and Chattanooga, Grant was promoted to Lieutenant General by President Lincoln in 1864 and given charge of all the Union Armies. Grant went on to defeat Robert E. Lee after another series of costly battles in the Overland Campaign, Petersburg, and Appomattox. After the Civil War, Grant was given his final promotion of General of the Armed Forces in 1866 and served until 1869. Grant's popularity as a Union war general enabled him to be elected two terms as the 18th President of the United States.
Document 6: Battle of Jackson, Mississippi: The Battle of Jackson, fought on May 14, 1863, in Jackson, Mississippi, was part of the Vicksburg Campaign in the American Civil War. Union commander Maj. Gen. Ulysses S. Grant and the Army of the Tennessee defeated elements of the Confederate Department of the West, commanded by General Joseph E. Johnston, seizing the city, cutting supply lines, and opening the path to the west and the Siege of Vicksburg.
Document 7: The Southerner (film): The Southerner is a 1945 American drama film directed by Jean Renoir and based on the 1941 novel "Hold Autumn in Your Hand" by George Sessions Perry. The film received Oscar nominations for Best Director, Original Music Score, and Sound. Renoir was named Best Director by the National Board of Review, which also named the film the third best of 1945. The film, now in the public domain, portrays the hardships of a poor family struggling to establish a cotton farm in Texas in the early 1940s.
Document 8: Battle of Shiloh: The Battle of Shiloh, also known as the Battle of Pittsburg Landing, was a major battle in the Western Theater of the American Civil War, fought April 6 -- 7, 1862, in southwestern Tennessee. A Union force known as the Army of the Tennessee under Major General Ulysses S. Grant had moved via the Tennessee River deep into Tennessee and was encamped principally at Pittsburg Landing, Tennessee on the west bank of that river, where the Confederate Army of Mississippi, under General Albert Sidney Johnston and second - in - command P.G.T. Beauregard, launched a surprise attack on Grant's army from its base in Corinth, Mississippi. Johnston was mortally wounded during the fighting; Beauregard, who thus succeeded to command of the army, decided against pressing the attack late in the evening. Overnight Grant was reinforced by one of his own divisions stationed further north and was joined by three divisions from another Union army under Maj. Gen. Don Carlos Buell. This allowed them to launch an unexpected counterattack the next morning which completely reversed the Confederate gains of the previous day.
Document 9: O Brother, Where Art Thou?: Charles Durning as Menelaus ``Pappy ''O'Daniel, the incumbent Governor of Mississippi. He is frequently seen berating his son and his campaign managers, who are depicted as simpletons. The character is based on Texas governor W. Lee`` Pappy'' O'Daniel. (Flensted - Jensen elaborates on the connection between the fictional and the real Pappy O'Daniel.) He corresponds to Menelaus in the Odyssey.
Document 10: Song of the South: Song of the South is a 1946 American live-action/animated musical film produced by Walt Disney and released by RKO Radio Pictures. It is based on the collection of Uncle Remus stories as adapted by Joel Chandler Harris, and stars James Baskett as Uncle Remus. The film takes place in the southern United States during the Reconstruction era, a period of American history shortly after the end of the American Civil War and the abolition of slavery. The story follows seven-year-old Johnny (Bobby Driscoll) who is visiting his grandmother's plantation for an extended stay. Johnny befriends Uncle Remus, one of the workers on the plantation, and takes joy in hearing his tales about the adventures of Br'er Rabbit, Br'er Fox, and Br'er Bear. Johnny learns from the stories how to cope with the challenges he is experiencing while living on the plantation.
Document 11: O Brother, Where Art Thou?: The film is set in 1937 rural Mississippi during the Great Depression, and its story is a modern satire loosely based on Homer's epic poem The Odyssey that incorporates mythology from the American South. The title of the film is a reference to the 1941 film Sullivan's Travels, in which the protagonist is a director who wants to film O Brother, Where Art Thou?, a fictional book about the Great Depression.
Document 12: Vicksburg campaign: The city had been under Union naval attack before. Admiral David Farragut moved up the river after his capture of New Orleans and on May 18, 1862, demanded the surrender of Vicksburg. Farragut had insufficient troops to force the issue, and he moved back to New Orleans. He returned with a flotilla in June 1862, but their attempts (June 26 -- 28) to bombard the fortress into surrender failed. They shelled Vicksburg throughout July and fought some minor battles with a few Confederate vessels in the area, but their forces were insufficient to attempt a landing, and they abandoned attempts to force the surrender of the city. Farragut investigated the possibility of bypassing the fortified cliffs by digging a canal across the neck of the river's bend, the De Soto Peninsula. On June 28, Brig. Gen. Thomas Williams, attached to Farragut's command, began digging work on the canal by employing local laborers and some soldiers. Many of the men fell victim to tropical diseases and heat exhaustion, and the work was abandoned by July 24. (Williams was killed two weeks later in the Battle of Baton Rouge).
Document 13: Tennessee: Many major battles of the American Civil War were fought in Tennessee—most of them Union victories. Ulysses S. Grant and the U.S. Navy captured control of the Cumberland and Tennessee rivers in February 1862. They held off the Confederate counterattack at Shiloh in April. Memphis fell to the Union in June, following a naval battle on the Mississippi River in front of the city. The Capture of Memphis and Nashville gave the Union control of the western and middle sections; this control was confirmed at the Battle of Murfreesboro in early January 1863 and by the subsequent Tullahoma Campaign.
Document 14: O Brother, Where Art Thou? (soundtrack): O Brother, Where Art Thou? is the soundtrack album of music from the 2000 American film of the same name, written, directed and produced by the Coen Brothers and starring George Clooney, John Turturro, Tim Blake Nelson, and John Goodman.
Document 15: Man of Constant Sorrow: Public interest in the song was renewed after the release of the 2000 film O Brother, Where Art Thou?, where it plays a central role in the plot. The song, with lead vocal by Dan Tyminski, was also included in the film's highly successful, multiple - platinum - selling soundtrack. This recording won a Grammy for Best Country Collaboration at the 44th Annual Grammy Awards in 2002.
ground_truth: American Civil War
sub_queries: where does o brother where art thou take place Answer: Mississippi
Battle of Jackson, Mississippi >> part of Answer: American Civil War