Question: What is the name of this infantry regiment of the United States Army, whose captain was John McCunn?

Context articles: 39th Arkansas Infantry Regiment
503rd Infantry Regiment (United States)
507th Parachute Infantry Regiment (United States)
69th Infantry Regiment (New York)
65th Infantry Regiment (United States)
299th Cavalry Regiment (United States)
506th Infantry Regiment (United States)
28th Infantry Regiment (United States)
74th Infantry Regiment (United States)
John McCunn

The 39th Arkansas Infantry Regiment or Cocke's Arkansas Infantry Regiment (also known as "Johnson's regiment," "Hawthorn's regiment," "Cocke's regiment," and "Polk's regiment") was an infantry formation in the Confederate States Army during the Civil War, and was successively commanded by Colonels A. W. Johnson, A. T. Hawthorn, J. B. Cocke, and Lieutenant-Colonel C. Polk.
 It was mustered into service on June 17, 1862, at Trenton, Arkansas, remaining active through May 26, 1865.
 When Major-General Sterling Price's staff decided to designate all infantry regiments in the District of Arkansas as "Trans-Mississippi rifle regiments", the 39th Arkansas Infantry Regiment was designated as the 6th Trans-Mississippi Rifle Regiment.
 One other Arkansas regiment was designated as the 39th Arkansas Infantry; that regiment being successively commanded by Colonels Hart, McNeill, and Rogan.
 It was originally designated as the 39th Arkansas, but later redesignated as the 30th Arkansas Infantry Regiment.
 The 39th served in the Trans-Mississippi Theater of the American Civil War and participated in all of the principal engagements in that department before disbanding on May 26, 1865.
The 503rd Infantry Regiment, formerly the 503rd Parachute Infantry Regiment (PIR) and the 503rd Airborne Infantry Regiment (AIR), is an airborne infantry regiment of the United States Army.
 The regiment served as an independent regiment in the Pacific War during World War II; at Fort Campbell, Kentucky; in Okinawa, Japan; and in Germany.
 Regimental elements have been assigned to the 2nd Infantry Division, the 11th Airborne Division, the 24th Infantry Division, the 82nd Airborne Division, and the 173rd Airborne Brigade Combat Team.
 Regimental elements have participated in campaigns in the Vietnam War, Operation Enduring Freedom–Afghanistan, and Operation Iraqi Freedom.
 The regiment claims 15 Medal of Honor recipients: two from World War II, 10 from Vietnam, and three from Afghanistan.
 A parent regiment under the U.S. Army Regimental System.
 The regiment's 1st and 2nd Battalions are active, assigned to the 173rd Airborne Brigade, based at Caserma Ederle, Vicenza, Italy.
The 507th Parachute Infantry Regiment (507th PIR), now the 507th Infantry Regiment, was an airborne infantry regiment of the United States Army.
 The regiment was initially assigned to the 82nd Airborne Division in World War II before transferring to the 17th Airborne Division.
 Now 1st Battalion, 507th Infantry Regiment is part of the United States Army Infantry School, subordinate to its Airborne and Ranger Training Brigade, responsible for the Army's Basic Airborne School, Jumpmaster School, Pathfinder School, and the "Silver Wings" Command Exhibition Parachute Team.
The 69th Infantry Regiment is an infantry regiment of the United States Army.
 It is from New York City, part of the New York Army National Guard.
 It is known as the "Fighting Sixty-Ninth", a name said to have been given by Robert E. Lee during the Civil War.
 An Irish heritage unit, as the citation from poet Joyce Kilmer illustrates, this unit is also nicknamed the "Fighting Irish", immortalized in Joyce Kilmer's poem "When the 69th Comes Home".
 Between 1917 and 1992 it was also designated as the 165th Infantry Regiment.
 It is headquartered at the 69th Regiment Armory in Manhattan.
The 65th Infantry Regiment, nicknamed "The Borinqueneers" from the original Taíno name of the island (Borinquen), is a Puerto Rican regiment of the United States Army.
 The regiment's motto is "Honor et Fidelitas", Latin for "Honor and Fidelity".
 The Army Appropriation Bill created by an act of Congress on 2 March 1898, authorized the creation of the first body of native troops in Puerto Rico.
 On 30 June 1901, the "Porto Rico Provisional Regiment of Infantry" was organized.
 On July 1, 1908, Congress incorporated the regiment into the Regular Army as the Puerto Rico Regiment of Infantry, United States Army.
 On May 14, 1917, the Regiment was activated and additional men were assigned, with the unit being sent to serve at Panama.
 On June 4, 1920, the Regiment was renamed 65th Infantry.
 During World War II, the Regiment saw action throughout Europe, especially France and Germany, participating in Naples-Foggia, Rome-Arno and Rhin.
 Several Purple Hearts were handed posthumously to members of the 65th Regiment, and the Medal of Honor was granted to Capt. Eurípides Rubio, Héctor Santiago, Carlos Lozada and Fernando García.
The 299th Cavalry Regiment, formerly the 299th Infantry Regiment, nicknamed the "The Koa Regiment", is a unit of the Hawaii Army National Guard.
 It was established in 1923 from the old 2nd Hawaiian Infantry Regiment, and it served during World War II as part of the 24th Infantry Division.
 The name "Koa" comes from the Hawaiian word for "Warrior", and is currently headquartered in Hilo, Hawaii.
 The 1st and 2nd Battalions, 299th Infantry were federally activated in 1968 to support the United States Army Pacific during the Vietnam War.
 More recently 2nd Battalion, 299th Infantry Regiment deployed to Iraq and again after being re-flagged in 2007 as 1st Squadron, 299th Cavalry Regiment.
The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment (506th PIR) during World War II, is an airborne light infantry regiment of the United States Army.
 Currently a parent regiment under the U.S. Army Regimental System, the regiment has two active battalions: the 1st Battalion, 506th Infantry Regiment (1-506th) is assigned to the 1st Brigade Combat Team, 101st Airborne Division, and the 2nd Battalion, 506th Infantry Regiment (2-506th) is assigned to the 3rd Brigade Combat Team, 101st Airborne Division.
Since the establishment of the United States Army in 1775, three regiments have held the designation 28th Infantry Regiment.
 The first was a provisional unit that was constituted on 29 January 1813 and served during The War of 1812.
 The second was a reorganization and redesignation of 2nd Battalion, 19th Infantry Regiment on 1 October 1866 for the American Indian Wars.
 This incarnation of the 28th Infantry Regiment lasted until 15 March 1869, when it was consolidated back into the 19th Infantry Regiment.
 The third version of the 28th Infantry Regiment is the one that has the permanent designation and history, and is the one this article is about.
The 74th Infantry Regiment was a regular infantry regiment of the United States Army.
 There have been two units given the title '74th Infantry Regiment'; the first was a World War I unit of the 12th Division, and the second was a World War II unit formed with US Army personnel and equipment of the inactivating US-Canadian 1st Special Service Force "Devil's Brigade".
 This unit was first designated as the 474th Infantry Regiment, later redesignated as the 74th Infantry Regiment.
John H. McCunn (Nov. 2, 1820–Jul. 6, 1872) belonged to a poor Irish immigrant family who arrived in New York City in the 19th century.
 He worked as a dockhand before training as a lawyer, and eventually becoming a judge.
 When the American Civil War began in 1861 he joined the Union Army as a Captain in the 69th New York Infantry Regiment before he recruited the 37th New York Infantry which he commanded as colonel.
 At war's end he was brevetted Brigadier General.
 He was a member of the infamous Tweed Ring, which he aided by naturalising new citizens to boost his election rolls.
 On one day alone, he naturalised over 2,000 new voters.
 However, when the scandal was uncovered, he was impeached and removed from office.