Question: What U.S. Army division, referred to as  is the focus of Bravo Company, a 1998 Vietnam War memoir by Robert Hemphill, the commander of this division?

Context paragraphs:
John J. McNulty, III: Colonel John Joseph “Jay” McNulty, III was Chief of the House Liaison Division of the Office of the Chief Legislative Liaison (United States Army) U.S. Secretary of the Army at The Pentagon.  Prior to closing his 29 years of service in the U.S. Army by serving, finally, in this sensitive position, Col. Jay McNulty was both an Army Vietnam War mechanized cavalry combat commander serving first with the 11th Armored Cavalry Division (Black Horse Regiment) and, later, with the 1st Cavalry Regiment (United States) (1st U.S. Dragoons) (Blackhawks), and, also, in peacetime, an Army commander of the 1st Squadron, 3rd Armored Cavalry Regiment, Ft. Bliss, Texas.  McNulty was a 1981 centennial class graduate of the United States Army Command and General Staff College.

Loren D. Hagen: Loren Douglas Hagen (February 25, 1946 – August 7, 1971) was a United States Army Special Forces officer and a recipient of the United States military's highest decoration—the Medal of Honor—for his actions during the Vietnam War as Recon Team (RT) leader of a small special reconnaissance unit "RT Kansas", manned by USASF Green Berets and highly trained Montagnard commandos from Task Force One Advisory Element aka Command & Control North, a division of Studies and Observations Group in the Vietnam War.  Hagen was the last member of the U.S. Army to earn a Medal of Honor in the Vietnam War.

Platoon Leader (memoir): Platoon Leader is a memoir by James R. McDonough.  It is narrated by McDonough in first person view and tells of his story in the Vietnam War as a lieutenant in command of 2nd Platoon, Bravo Company, 4th Battalion, 503rd Infantry(Airborne).

Vietnam Magazine: Vietnam Magazine is a full-color history magazine published bi-monthly which covers the Vietnam War.  It was founded in 1988 by the late Colonel Harry G. Summers, Jr. Colonel Summers served in the U.S. Army in both Korea and Vietnam, where he was twice wounded and decorated for valor.  The current editor is David T. Zabecki, a major general in the U.S. Army Reserve and currently the Deputy Chief of Staff for Mobilization and Reserve Affairs for U.S. Army Europe.

Platoon: Bravo Company: Platoon: Bravo Company (1998) is a Vietnam War memoir by Robert Hemphill (with foreword by Joe Galloway), who commanded B (Bravo) Company, 3rd Battalion, 22nd Infantry of the 25th Infantry Division (U.S. Army) in Vietnam from 1 October 1967 to 18 February 1968.

Harry G. Summers Jr.: Harry G. Summers Jr. (May 6, 1932 – November 14, 1999) is best known as the author of the neo-Clausewitzean analysis of the Vietnam War titled, "On Strategy: A Critical Analysis of the Vietnam War" (1982).  Summers was an infantry colonel in the United States Army, and had served as a squad leader in the Korean War and as a battalion and corps operations officer in the Vietnam War.  Colonel Summers was also an instructor and Distinguished Fellow at the Strategic Studies Institute at the U.S. Army War College in Carlisle, Pennsylvania, and served on the negotiation team for the United States at the end of the Vietnam War.

25th Infantry Division (United States): The 25th Infantry Division (nicknamed "Tropic Lightning" and the "Electric Strawberry" is a U.S. Army division based in Hawaii.  The division, which was activated on 1 October 1941 in Hawaii, conducts military operations in the Asia-Pacific region.  Its present deployment is composed of Stryker, light infantry, airborne, and aviation units.

Eduard von Lewinski: Von Lewinski was born in Münster in the Province of Westphalia.  He served in the 1864 Danish-Prussian War as a captain of the 1st Guard fortress company.  In the 1866 German war he was assigned as a staff officer to the First Army division.  In 1867 Lewinski was promoted to major on the general staff.  He later served in the Franco-Prussian War of 1870, first on the staff of the First Army division and later commanding the quartermaster corps of the South Army.  In 1871 he became commander of the general staff of the 9th Army corps.  In 1872 he was promoted to lieutenant colonel and assumed command of the South Army's 24th artillery regiment.

Maywand District murders: The Maywand District killings were the murders of at least three Afghan civilians perpetrated by a group of U.S. Army soldiers in 2010, during the War in Afghanistan.  The soldiers, who referred to themselves as the "Kill Team", were members of the 3rd Platoon, Bravo Company, 2nd Battalion, 1st Infantry Regiment and 5th Brigade, 2nd Infantry Division.  They were based at FOB Ramrod in Maiwand, from Kandahar Province of Afghanistan.

2nd Battalion (Norway): The 2nd Battalion (Norwegian: "2.  bataljon" ; abbreviated as 2BN) is an infantry unit of the Norwegian Army, based at camp Skjold in Troms county in Northern Norway.  It serves in the light infantry role specialized in Arctic warfare as part of Brigade Nord; the battalion is one of three manoeuvre battalions within the brigade, along with Telemark Battalion and Panserbataljonen.  The 2nd Battalion serves two roles, primarily being organised for domestic defence; however, during Norway's contribution to the NATO forces in Afghanistan, the 2nd Battalion played a vital role.  The 2nd Battalion also contributed consistently to the ISAF forces in northern Afghanistan, supporting an elite trained light infantry, organized as a Quick Reaction Force (QRF).  The battalion is divided into four companies: Bravo company, Charlie company, the cavalry squadron and the support company.  Bravo company and Charlie coy serves as specialized light infantry, focusing on Arctic warfare and urban warfare.  The cavalry squadron is the battalion's internal intelligence unit as well as consisting of one platoon of marksmen.  The support company is the largest of the four, and primarily consists of medics, anti-tank personnel, combat, service and support.  The battalion uses a khaki beret, as opposed to the traditional black beret worn by cavalry units throughout the world, which symbolizes the battalion's long and proud history of producing some of Norway's most elite and well equipped soldiers.

Supporting paragraphs: Platoon: Bravo Company 25th Infantry Division (United States)
Answer: 25th Infantry Division