Question: In what battle did businessman and farmer lead troops to kill one of the deadliest and most brutal pro-Conferderate guerrilla leaders in the American Civil War?

Context articles: The Outlaw Josey Wales
Battle of Island Mound State Historic Site
Edisto Island during the American Civil War
Battle of Natural Bridge
William T. Anderson
Honey Hill-Boyd's Neck Battlefield
Eric J. Wittenberg
Banastre Tarleton
Samuel P. Cox
Thomas Neville Waul

The Outlaw Josey Wales is a 1976 American revisionist Western DeLuxe Color and Panavision film set during and after the American Civil War.
 It was directed by and starred Clint Eastwood (as the eponymous Josey Wales), with Chief Dan George, Sondra Locke, Sam Bottoms, and Geraldine Keams.
 The film tells the story of Josey Wales, a Missouri farmer whose family is murdered by Union militants during the Civil War.
 Driven to revenge, Wales joins a Confederate guerrilla band and fights in the Civil War.
 After the war, all the fighters in Wales' group except for Wales surrender to Union officers, but they end up being massacred.
 Wales becomes an outlaw and is pursued by bounty hunters and Union soldiers.
The Battle of Island Mound State Historic Site is located in a rural area of Bates County, Missouri, in the western part of the state.
 The site was established in 2012 to preserve the area of the American Civil War battle that took place in October 28-29, 1862 between Union forces and Confederate guerrillas.
 The battle was significant as the first time African-American troops on the Union side engaged enemy white troops in the Civil War.
 A "New York Times" correspondent reported on the battle; the headline noted the "desperate bravery" of the African Americans in achieving Union victory.
Edisto Island during the American Civil War was the location of a number of minor engagements and for a time of a large colony of African-American escaped former slaves during the American Civil War (1861–1865).
 Edisto Island was largely abandoned by planters in November 1861 and in December 1861, escaped slaves began setting up their own refugee camps there.
 In January 1862, armed African Americans from the island and Confederate forces clashed and a Confederate raid in reprisal killed a small number of unarmed African Americans.
 In February, Union forces were stationed on the island to develop it as a staging area for future campaigns against Charleston, twenty-five miles away, as well as to protect the colony, which would eventually number thousands of African Americans.
 As Union forces took control of the island, a number of skirmishes occurred, but Confederates withdrew.
 In June, most of the Union troops left the island in a campaign, which culminated in the Battle of Secessionville.
 In July, the remaining troops withdrew, and the colony was removed to St. Helena Island.
 For the rest of the war, a small number of escaped slaves and plantation owners remained and farmed the island, but it was largely abandoned.
 Near the end of the war, the island was again used as a location of colonies of freed slaves.
The Battle of Natural Bridge was a battle during the American Civil War, fought in what is now Woodville, Florida, near Tallahassee, on March 6, 1865.
 A small band of Confederate troops and volunteers, mostly composed of teenagers from the nearby Florida Military and Collegiate Institute that would later become Florida State University, and the elderly, protected by breastworks, prevented a detachment of United States Colored Troops from crossing the Natural Bridge on the St. Marks River.
 The Natural Bridge is a one-quarter mile long stretch along which the St. Marks River runs underground, after dropping into a sinkhole.
 This action prevented the Union Army from capturing the Florida capital and made Tallahassee the only Confederate capital east of the Mississippi River not to be captured by Union forces during the war.
 The battle has been described as the last Confederate victory in the American Civil War, and it was the second largest American Civil War battle in Florida.
William T. Anderson (1840 – October 26, 1864)—known as "Bloody Bill" Anderson—was one of the deadliest and most brutal pro-Confederate guerrilla leaders in the American Civil War.
 Anderson led a band that targeted Union loyalists and Federal soldiers in Missouri and Kansas.
Honey Hill-Boyd's Neck Battlefield is a historic battlefield site located near Ridgeland, Jasper County, South Carolina.
 The boundary encompasses the site of the American Civil War Battle of Honey Hill, November 30, 1864, as well as the Federal enclave on Boyd’s Neck and other related areas of the Honey Hill campaign, November 29, 1864 to January 11, 1865.
 The Battle of Honey Hill was one of the three largest Civil War battles fought in South Carolina, and was one of the most notable Civil War engagements involving African American troops.
 The site includes the largely intact 1864 road network and extensive American Civil War earthworks.
Eric J. Wittenberg (born March 26, 1961) is an American Civil War (Civil War) historian, author, lecturer, tour guide and battlefield preservationist.
 He is a practicing attorney in downtown Columbus, Ohio.
 His published works have focused especially on the Civil War cavalryman and the cavalry battles of the Civil War, with emphasis on the Army of the Potomac's Cavalry Corps.
 His first book, "Gettysburg's Forgotten Cavalry Actions", was chosen as the best new work addressing the Battle of Gettysburg in 1998, winning the Robert E. Lee Civil War Roundtable of Central New Jersey's Bachelder-Coddington Award.
 The second edition of this book, published in 2011, won the U. S. Army Historical Foundation's Distinguished Writing Award for that year's best reprint.
 In 2015, his book "The Devil's to Pay: John Buford at Gettysburg" won the Gettysburg Civil War Roundtable's 2015 Book Award.
 He was a member of the Governor of Ohio’s Advisory Commission on the Sesquicentennial of the Civil War and has been active with several Civil War battlefield preservation organizations.
 He and his wife Susan Skilken Wittenberg reside on the east side of Columbus, Ohio.
Sir Banastre Tarleton, 1st Baronet, GCB (21 August 175415 January 1833) was a British soldier and politician.
 Tarleton was eventually ranked as a general years after his service in the colonies during the American Revolutionary War, and afterwards did not lead troops into battle.
Samuel P. Cox (December 16, 1828 – August 21, 1913) was a businessman and farmer who is best remembered as the commander of the Union troops that killed "Bloody Bill" Anderson in the Battle of Albany in the American Civil War.
Thomas Neville Waul (January 5, 1813 – July 28, 1903) was a Confederate States Army brigadier general during the American Civil War (Civil War).
 Before the Civil War, he was a teacher, lawyer, judge and planter.
 He served for a year in the Provisional Confederate Congress from Texas.
 He was captured at the fall of Vicksburg, Mississippi on July 4, 1863 and exchanged in October 1863.
 After his promotion, Waul served in the Confederate Trans-Mississippi Department.
 He was wounded at the Battle of Jenkins' Ferry.
 After the Civil War, Waul was a farmer and lawyer who lived in Texas until his death at age 90.