Question: Fort Reno is named for a general that was killed while commanding a corp during what battle?

Context articles: Fort Reno (Oklahoma)
Fort Kearny (Washington, D.C.)
Fort Reno Park
Fort Reno
Fort Reno (Wyoming)
Johannes Kunze
David D. Halverson
Dana J.H. Pittard
El Reno, Oklahoma
Jesse L. Reno

Fort Reno is a former United States Army cavalry post west of El Reno, Oklahoma.
 It is named for General Jesse L. Reno, who died at the Battle of South Mountain in the American Civil War.
Fort Kearny was a fort constructed during the American Civil War as part of the defenses of Washington, D.C. Located near Tenleytown, in the District of Columbia, it filled the gap between Fort Reno and Fort DeRussy north of the city of Washington.
 The fort was named in honor of Maj. Gen. Philip Kearny of the Union Army, who was killed at the Battle of Chantilly on September 1, 1862.
 Three batteries of guns (Battery Rossell, Battery Terrill, and Battery Smead) supported the fort, and are considered part of the fort's defenses.
Fort Reno Park is a park in the Tenleytown neighborhood of Washington, D.C. The park contains the highest natural point in the District of Columbia.
 Fort Reno was also the location of the only Civil War battle to take place in the District of Columbia, at the Battle of Fort Stevens.
Fort Reno may refer to any of the three United States Army posts named for General Jesse L. Reno:
Fort Reno also known as Fort Connor or Old Fort Reno, was a wooden Fort established on August 15, 1865 by the United States Army in Dakota Territory in present-day Johnson County, Wyoming.
 The fort was built to protect travelers on the Bozeman Trail from Native American tribes.
Wilhelm Reinhold Johannes Kunze (March 5, 1904 – November 4, 1943) was a German World War II prisoner of war (POW) held at Camp Tonkawa, Oklahoma.
 He was a "Gefreiter" in the Afrika Korps.
 Following a trial before a kangaroo court on November 4, 1943, he was beaten to death by fellow POWs for being a traitor and there was very strong evidence that Kunze had indeed been spying for the Americans.
 The unmasking of Kunze happened by accident: he had been in the habit of passing notes to the American doctor at the camp during sick call.
 These notes contained useful information regarding the activities of various POWs in the camp, some of whom were loyal Nazis.
 One day a new American doctor was on duty who did not know about Kunze's role as spy and who could not speak German.
 When Kunze handed over his note, the American doctor accidentally blew Kunze's cover by sending it back via another POW, who read the incriminating note and quickly realised that Kunze was a spy.
 News of this discovery spread quickly and soon afterwards Kunze was killed inside the camp by his fellow POWs.
 He is buried in the Fort Reno prisoner of war cemetery.
LTG David D. Halverson assumed the duties of the commanding general of the U.S. Army Installation Management Command and Assistant Chief of Staff for Installation Management April 8, 2014.
 Previously, he served as deputy commanding general/chief of staff, U.S. Army Training and Doctrine Command TRADOC.
 Halverson assumed duties as the Deputy Commanding General/Chief of Staff, U.S. Army Training and Doctrine Command on 4 June 2012.
 Halverson's first duty assignment was in the 1st Cavalry Division, Fort Hood, Texas in 1979 where he served as a Battalion Reconnaissance Officer, Battery Fire Direction and Executive Officer and Battalion Adjutant.
 Since then, Halverson has served in various staff and leadership positions including command at every level from Battery to Post Command.
 His commands include A Battery, 6th Battalion, 29th Field Artillery, 8th Infantry Division; 2nd Battalion, 82nd Field Artillery, 1st Cavalry Division; 2nd Infantry Division Artillery, Operational Test Command, and Commanding General, Fires Center of Excellence and Fort Sill.
Dana J.H. Pittard is a retired United States Army officer.
 He was Deputy Commanding General of Operations (DCG-O) for ARCENT, the US Central Command / Third Army, based in Kuwait, until 2015.
 Pittard was appointed Joint Force Land Component Commander-Iraq, in response to the June 2014 incursions into Iraq from Syria by the Islamic State in Iraq and the Levant (Daesh), in the days post June 9, 2014.
 Pittard was the Commanding General of 1st Armored Division and Fort Bliss in El Paso, Texas.
 He was also Deputy Chief of Staff of Operations & Training at the Training and Doctrine Command (TRADOC) at Fort Monroe, Virginia and commanding general of the National Training Center, Fort Irwin, California.
El Reno is a city in and county seat of Canadian County, Oklahoma, United States.
 As of the 2010 census, the city population was 16,729.
 The city was begun shortly after the 1889 land rush and named for the nearby Fort Reno.
 It is located in the central part of the state, approximately 25 mi west of downtown Oklahoma City, and is part of the Oklahoma City Metropolitan Statistical Area.
Jesse Lee Reno (April 20, 1823 – September 14, 1862) was a career United States Army officer who served in the Mexican–American War, the Utah War, the western frontier, and as a Union General during the American Civil War.
 Known as a "soldier's soldier" who fought alongside his men, he was killed while commanding a corps at Fox's Gap during the Battle of South Mountain.
 Reno County, Kansas, El Reno, Oklahoma, Reno, Nevada, Reno, Pennsylvania and Fort Reno in Washington, D.C. were named after him.