The storming of Redoubt No. 10 in the Siege of Yorktown during the American Revolutionary War prompted Great Britain's government to begin negotiations, resulting in the Treaty of Paris and Great Britain's recognition of the United States as an independent state.
The Joint Chiefs of Staff in December 2020.
General Andrew Jackson standing on the parapet of his makeshift defenses as his troops repulse attacking Highlanders during the defense of New Orleans, the final major and most one-sided battle of the War of 1812
Organization of the military services and military departments within the Department of Defense
The Battle of Gettysburg, the turning point of the American Civil War
Logo of the United States Army
Army soldiers in 1890
U.S. Army Soldiers with 2nd Battalion, 327th Infantry Regiment, 101st Airborne Division return fire during a firefight with Taliban forces in Barawala Kalay Valley in Kunar province, Afghanistan on 31 March 2011.
U.S. Army troops assaulting a German bunker in France, c. 1918
U.S. Army M1A2 Abrams tanks from the 3rd Armored Cavalry Regiment maneuver in the streets as they conduct a combat patrol in the city of Tall Afar, Iraq, on Feb. 3, 2005.
U.S. soldiers hunting for Japanese infiltrators during the Bougainville Campaign
Eagle, Globe, and Anchor
U.S. Army soldiers observing an atomic bomb test of Operation Buster-Jangle at the Nevada Test Site during the Korean War
U.S. Marines with India Company, Battalion Landing Team, 3rd Battalion, 2nd Marine Regiment, 22nd Marine Expeditionary Unit run on the beach during an amphibious assault demonstration.
US tanks and Soviet tanks at Checkpoint Charlie, 1961
A U.S. Marine Corps MV-22 Osprey tiltrotor aircraft attached to VMX-22 prepares to land on the amphibious assault ship USS America (LHA-6) in the Pacific Ocean.
A U.S. Army infantry patrol moving up to assault the last North Vietnamese Army position at Dak To, South Vietnam during Operation Hawthorne
Logo of the United States Navy
U.S. Army soldiers preparing to take La Comandancia in the El Chorrillo neighborhood of Panama City during Operation Just Cause
USS John C. Stennis (CVN-74) and Carrier Strike Group 3 underway with Republic of Korea Navy ships.
M1 Abrams tanks moving out before the Battle of Al Busayyah during the Gulf War
USS Nebraska (SSBN-739), an 
 ballistic missile submarine underway in the Atlantic Ocean.
Iraqi tanks destroyed by Task Force 1-41 Infantry during the Gulf War, February 1991
United States Air Force Symbol
U.S. Army Rangers taking part in a raid during an operation in Nahr-e Saraj, Afghanistan
F-22A Raptors in flight.
U.S. Army soldiers with the 2nd Battalion, 327th Infantry Regiment, 101st Airborne Division returning fire during a firefight with Taliban forces in Barawala Kalay Valley in Kunar province, Afghanistan, March 2011
U.S. Air Force B-2A Spirit stealth bombers flying with Royal Air Force F-35B Lightning II stealth fighters.
Organization of the United States Army within the Department of Defense
Space Force Delta
U.S. Army organization chart
The Sodium Guidestar at the Directed Energy Directorate's Starfire Optical Range for real-time, high-fidelity tracking and imaging of satellites.
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Boeing X-37B spaceplane after deorbiting and landing.
U.S. Army soldiers of the 1st Battalion, 175th Infantry Regiment, Maryland Army National Guard conducting an urban cordon and search exercise as part of the army readiness and training evaluation program in the mock city of Balad at Fort Dix, New Jersey
Service mark of the United States Coast Guard
U.S. soldiers from the 6th Infantry Regiment taking up positions on a street corner during a foot patrol in Ramadi, Iraq
USCGC Hamilton and TCG Turgutries in the Black Sea, April 30, 2021.
The 1st Cavalry Division's combat aviation brigade performing a mock charge with the horse detachment
Coast Guard Reserve Port Security boat on patrol
U.S. Army Special Forces soldiers from the 3rd Special Forces Group patrolling a field in the Gulistan district of Farah, Afghanistan
Unified combatant commands areas of responsibility
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A pie chart showing global military expenditures by country for 2019, in US$ billions, according to SIPRI
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Sergeant Leigh Ann Hester, awarded the Silver Star for direct combat
U.S. Army Rangers practicing fast roping techniques from an MH-47 during an exercise at Fort Bragg
A trainer with Company A, 1st Battalion 502nd Infantry Regiment, Task Force Strike, 101st Airborne Division assisting Iraqi army ranger students during a room clearing drill at Camp Taji, Iraq on 18 July 2016
U.S. Army soldiers familiarizing with the latest INSAS 1B1 during exercise Yudh Abhyas 2015
A Lockheed Martin Terminal High Altitude Area Defense (THAAD) system used for ballistic missile protection
A U.S. soldier on patrol in Iraq with the support of a Humvee vehicle
3rd Infantry Division soldiers manning an M1A1 Abrams in Iraq
The 2020 Army Greens uniform
An element of the 18th Infantry Regiment, wearing ASUs, representing the United States at the 2010 Victory Day commemoration in Moscow
The Ranger Honor Platoon marching in their tan berets and former service uniform
ADM Linda L. Fagan June 2021.

The United States Army (USA) is the land service branch of the United States Armed Forces.

- United States Army

The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard.

- United States Armed Forces
The storming of Redoubt No. 10 in the Siege of Yorktown during the American Revolutionary War prompted Great Britain's government to begin negotiations, resulting in the Treaty of Paris and Great Britain's recognition of the United States as an independent state.

10 related topics

Alpha

The first F-35 Lightning II of the 33rd Fighter Wing arriving at Eglin AFB

United States Air Force

The first F-35 Lightning II of the 33rd Fighter Wing arriving at Eglin AFB
An Air Force RQ-4 strategic reconnaissance aircraft
An Air Force KC-46 Pegasus refuels a C-17A Globemaster III
An Air Force A-10 demonstrating close air support at Nellis AFB
Test launch of a LGM-30 Minuteman Intercontinental Ballistic Missile from Vandenberg AFB
Combined Air Operations Center at Al Udeid Air Base
Roundels that have appeared on U.S. military aircraft
1.) 5/1917–2/1918
2.) 2/1918–8/1919
3.) 8/1919–5/1942
4.) 5/1942–6/1943
5.) 6/1943–9/1943
6.) 9/1943–1/1947
7.) 1/1947–
The SR-71 Blackbird was a Cold War reconnaissance plane.
The F-117 Nighthawk was a stealth attack aircraft (retired from service in April 2008).
A row of Douglas C-54 Skymasters during the Berlin Airlift in 1949
Various Air Force personnel pose during the Air Force's 74th birthday celebration at the Pentagon, September 17, 2021.
Organization of the United States Air Force within the Department of Defense
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Pararescuemen and a simulated "survivor" watch as an HH-60G Pave Hawk helicopter comes in for a landing
U.S. Air Force trainee demonstrating a butt stroke on a strike dummy as part of Basic Military Training.
USAF Airmen training at Lackland AFB
A-10 Thunderbolt II ground-attack aircraft
B-2 Spirit stealth bomber
A C-17 Globemaster III, the USAF's newest and most versatile transport plane
E-3 Sentry airborne warning and control system
F-22 Raptor stealth air superiority fighter
KC-10 Extender tri-jet air-to-air tanker
An MC-12W Liberty at Beale AFB
MQ-9 unmanned aerial vehicle
Lockheed U-2 spy plane
RQ-170 Sentinel stealth unmanned aerial vehicle reconnaissance aircraft
VC-25A (Air Force One)
A WC-130J Hercules from the 53rd Weather Reconnaissance Squadron
An unarmed Minuteman III ICBM shoots out of the silo during an operational test launch

The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight U.S. uniformed services.

Originally created in 1907 as a part of the United States Army, the USAF was established as a separate branch of the U.S. Armed Forces in 1947 with the passing of the National Security Act of 1947.

United States Department of Defense

President Truman signs the National Security Act Amendment of 1949
Department of Defense organizational chart (December 2013)
2008 OSD organizational chart
Joint Chiefs of Staff/Joint Staff organizational chart
Combatant command areas of responsibility
Defense Spending as a Percent of GDP (1792–2017)
Total United States Defense Outlays 1962–2024, $millions (2019-2024 estimated)
Defense Intelligence Agency
National Security Agency
National Geospatial-Intelligence Agency
National Reconnaissance Office
Department of the Army
Department of the Navy
Department of the Air Force
U.S. Army
U.S. Marine Corps
U.S. Navy
U.S. Air Force
U.S. Space Force

The United States Department of Defense (DoD, USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government directly related to national security and the United States Armed Forces.

1) the Department of the Army, within which the United States Army is organized.

Emblem of the United States Marine Corps

United States Marine Corps

Emblem of the United States Marine Corps
U.S. Marines from the 31st Marine Expeditionary Unit training
Marines from the 15th Marine Expeditionary Unit depart USS Tarawa (LHA-1), using both a Landing Craft Utility and CH-53E "Super Stallion" helicopters, during amphibious operations in Kuwait, 2003.
Maj. Samuel Nicholas, first Commandant of the Marine Corps, was nominated to lead the Continental Marines by John Adams in November 1775.
British and U.S. troops garrisoned aboard Hornet and Penguin exchanging small arms musket fire with Tristan da Cuna in the background during the final engagement between British and U.S. forces in the War of 1812
The Final Stand at Bladensburg, Maryland, 24 August 1814
Five USMC privates with fixed bayonets, and their NCO with his sword at the Washington Navy Yard, 1864
Georges Scott, American Marines in Belleau Wood, 1918
Former French Foreign Legion Lieutenant, and U.S. Marine Corps officer Peter J. Ortiz, who served in the European theater, often behind enemy lines
Photograph of the Marine Corps War Memorial, which depicts the second U.S. flag-raising atop Mount Suribachi, on Iwo Jima. The memorial is modeled on Joe Rosenthal's famous Raising the Flag on Iwo Jima.
F4U Corsairs providing close air support to Marines of the 1st Marine Division fighting Chinese forces in North Korea, December 1950
U.S. Marines of "G" Company, 2nd Battalion, 7th Marines in action during Operation Allen Brook in South Vietnam, 1968
Beirut Memorial at Marine Corps Base Camp Lejeune
U.S. Marines from 1st Battalion, 7th Marines entering a palace in Baghdad in 2003
U.S. Marines dismounting from an Assault Amphibious Vehicle in Djibouti
Organization of the United States Marine Corps
Marine Raiders conducting CQB training
Opha Johnson (far right) in 1946, with Katherine Towle (far left). They are looking at Opha Johnson's uniform being worn by PFC Muriel Albert.
Two of the first female graduates of the School of Infantry-East's Infantry Training Battalion course, 2013
Marine recruits at Marine Corps Recruit Depot San Diego
U.S. Marines in training
An illustration of U.S. Marines in various uniform setups. From left to right: A U.S. Marine in a Marine Corps Combat Utility Uniform with full combat load circa 2003, a U.S. Marine in a (full) blue dress uniform, a U.S. Marine officer in a service uniform, and a U.S. Marine general in an evening dress uniform.
The Eagle, Globe and Anchor along with the U.S. flag, the Marine Corps flag and the Commandant's flag
A recruiting poster making use of the "Teufel Hunden" [sic] nickname
Marines training in martial arts
Marines firing MEU(SOC) pistols while garrisoned aboard a ship
Marine Amphibious Assault Vehicles emerge from the surf onto the sand of Freshwater Beach, Australia
Marine parachutists jumping from an MV-22 Osprey at 10,000 feet
A Marine Corps F-35B, the vertical-landing version of the F-35 Lightning II multirole fighter landing aboard USS Wasp (LHD-1)
Assault Amphibious Vehicles approaching the well deck of USS Bonhomme Richard (LHD-6)
A Marine and sailor training with rifles in Iraq
A soldier from the 1st Infantry Regiment provides security for a joint Army-Marine patrol in Rawa in 2006. The shoulder sleeve insignia has the logo of the 2nd Marine Division.
Marines unloading CH-46 Sea Knight helicopters from an Air Force C-5 Galaxy

The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through combined arms, implementing its own infantry, artillery, aerial, and special operations forces.

Development of tactics, technique, and equipment used by amphibious landing forces in coordination with the Army and Air Force; and

United States Secretary of Defense

Seal of the National Military Establishment (1947–1949)
Donald Rumsfeld is sworn-in as Secretary of Defense by Associate Supreme Court Justice Potter Stewart as U.S. President Gerald R. Ford and Chairman of The Joint Chiefs of Staff General George S. Brown watch at The Pentagon on November 20, 1975.
Department of Defense organizational chart (December 2013)

The United States secretary of defense (SecDef) is the head of the United States Department of Defense, the executive department of the U.S. Armed Forces, and is a high ranking member of the federal cabinet.

Subject only to the orders of the president, the secretary of defense is in the chain of command and exercises command and control, for both operational and administrative purposes, over all service branches administered by the Department of Defense – the Army, Marine Corps, Navy, Air Force, and Space Force – as well as the Coast Guard when its command and control is transferred to the Department of Defense.

A sergeant of the Coldstream Guards addressing through the ranks during the rehearsal for the Trooping the Colour ceremony.

Non-commissioned officer

Military officer who has not pursued a commission.

Military officer who has not pursued a commission.

A sergeant of the Coldstream Guards addressing through the ranks during the rehearsal for the Trooping the Colour ceremony.
Sergeant, Royal Artillery, on the esplanade of Edinburgh Castle, firing the one o'clock gun
A First Sergeant with the 55th Signal Company (Combat Camera) gets his soldiers ready for a uniform inspection

In the Army, Air Force, and Marine Corps, all ranks of sergeant are termed NCOs, as are corporals in the Army and Marine Corps.

Warrant officers in the United States Armed Forces are considered specialty officers and fall in between enlisted and commissioned officers.

The Joint Chiefs of Staff in December 2020.

Joint Chiefs of Staff

Body of the most senior uniformed leaders within the United States Department of Defense, that advises the president of the United States, the secretary of defense, the Homeland Security Council and the National Security Council on military matters.

Body of the most senior uniformed leaders within the United States Department of Defense, that advises the president of the United States, the secretary of defense, the Homeland Security Council and the National Security Council on military matters.

The Joint Chiefs of Staff in December 2020.
United States Secretary of Defense Harold Brown and United States Deputy Secretary of Defense Charles W. Duncan Jr with Chairman of the Joint Chiefs of Staff General George S. Brown and the other members of the Joint Chiefs of Staff at the Pentagon in 1977
Joint Chiefs of Staff meeting (circa 1943). From left to right are: Gen. Henry H. Arnold, Chief of the Army Air Forces; Adm. William D. Leahy, Chief of Staff to the Commander in Chief of the Army and Navy; Adm. Ernest J. King, Commander in Chief, U.S. Fleet and Chief of Naval Operations; and Gen. George C. Marshall, Chief of Staff of the United States Army.
The Joint Chiefs of Staff in 1959.
The Joint Chiefs of Staff in an annual meeting with the commanders of unified and specified command in the JCS meeting room, also known as "The Tank" on January 15, 1981.
The Joint Chiefs of Staff in 2002
The Joint Staff Organization Chart as of March 2018
Members of the Joint Chiefs of Staff during a press conference at The Pentagon with Secretary of Defense. From left to right are Army Vice Chief of Staff General Richard A. Cody, Chief of Naval Operations Admiral Vern Clark, Chairman of the Joint Chiefs of Staff, U.S. Air Force General Richard B. Myers, U.S. Secretary of Defense Donald Rumsfeld, Air Force Chief of Staff General John P. Jumper and Commandant of the Marine Corps General Michael Hagee. In the absence of the Chairman of the Joint Chiefs of Staff or the Service Chief, the Vice Chairman of the Joint Chiefs of Staff and the Vice Service Chief will replace its presence at an important event.
Members of The Joint Chiefs of Staff with U.S. Secretary of Defense in 1973.
The Joint Chiefs of Staff (seated) and the directors of the Joint Staff directorates (standing), November 1989.
The Joint Chiefs of Staff during its early days in 1949.
Members of the Joint Chiefs of Staff at The Pentagon in 1958.
The Joint Chiefs of Staff in 1961.
The Joint Chiefs of Staff in 1968.
The Joint Chiefs of Staff in 1971.
The Joint Chiefs of Staff in 1977.
Members of the Joint Chiefs of Staff with President-Elect Jimmy Carter and Secretary of Defense Donald Rumsfeld on December 17, 1976.
Members of the Joint Chiefs of Staff during a cabinet meeting in the White House in 1977
The Joint Chiefs of Staff in 1981.
Members of the Joint Chiefs of Staff during President Ronald Reagan Inaugural Parade in January 20, 1981.
The Joint Chiefs of Staff in 1983.
The Joint Chiefs of Staff in 1986.
The Joint Chiefs of Staff in 2001.
Members of the Joint Chiefs of Staff render a salute for the late President Ronald Reagan at Andrews Air Force Base in 2004.
Members of the Joint Chiefs of Staff at Andrews Air Force Base during a funeral service ceremony for the late President Gerald Ford on December 26, 2006.
The Joint Chiefs of Staff at the Senate Armed Services Committee testimony in The Capitol Hill 2010.
The Joint Chiefs of Staff in 2017.

After the 1986 reorganization of the Armed Forces undertaken by the Goldwater–Nichols Act, the Joint Chiefs of Staff does not possess operational authority over troops or other units.

As the U.S. military grew in size following the American Civil War, joint military action between the Army and Navy became increasingly difficult.

AAF Shoulder Sleeve Insignia

United States Army Air Forces

AAF Shoulder Sleeve Insignia
General of the Army Henry H. ("Hap") Arnold
USAAF recruitment poster
Tuskegee Airmen War bonds poster
1943 portrait of WAC air controller
AAF Training Command patch
USAAF recruiting poster
USAAF insignia from July 1943 to January 1947
B-17G Fortresses of the 306th Bomb Group
P-51 Mustang of 361st Fighter Group, 1944
Taylorcraft L-2
C-47 of the 438th Troop Carrier Group
USAAF AT-6Cs near Luke Field, 1943
UC-64 Norseman
General Carl A. Spaatz
Medal of Honor recipient Major Richard Bong in Officer's Service Dress
Awards ceremony at RAF Debden, April 1944, illustrating varying shades of olive drab and the M-1944 "Ike jacket". Light shade 33 on left, dark shade 51 on right. Trousers are shade 33, khaki shade 1, and drab shade 54. The three combinations at right are "pinks and greens".
At the AAF School of Air Evacuation at Bowman Field, Ky., student flight nurses learned how to handle patients with the aid of a mock-up fuselage of a Douglas C-47 transport.
Female service dress in OD shade 33 at Randolph Field, 1944
USAAF flight crew
First Air Force
Second Air Force
Third Air Force
Fourth Air Force
Fifth Air Force
Sixth Air Force
Seventh Air Force
Eighth Air Force
Ninth Air Force
Tenth Air Force
Eleventh Air Force
Twelfth Air Force
Thirteenth Air Force
Fourteenth Air Force
Fifteenth Air Force
Twentieth Air Force

The United States Army Air Forces (USAAF or AAF) was the major land-based aerial warfare service component of the United States Army and de facto aerial warfare service branch of the United States during and immediately after World War II (1941–1945).

It was created on 20 June 1941 as successor to the previous United States Army Air Corps and is the direct predecessor of the United States Air Force, today one of the six armed forces of the United States.

A commissioned officer (left) and a non-commissioned officer of the British Army prepare for a mission in Afghanistan.

Officer (armed forces)

Person who holds a position of authority as a member of an armed force or uniformed service.

Person who holds a position of authority as a member of an armed force or uniformed service.

A commissioned officer (left) and a non-commissioned officer of the British Army prepare for a mission in Afghanistan.
An Indonesian army officer serving as a ceremonial field commander
The Royal Navy officer training academy Britannia Royal Naval College at Dartmouth
Newly commissioned U.S. Navy and Marine Corps officers celebrate their new positions by throwing their midshipmen covers into the air as part of the U.S. Naval Academy class of 2005 graduation and commissioning ceremony.
A platoon from the Australian 29th Battalion being addressed by their officer commanding in August 1918
An officer of the People's Liberation Army.

United States Military Academy (USMA) (commissions 2nd lieutenants in the U.S. Army)

In the United States Armed Forces, enlisted military personnel without a four-year university degree at the bachelor's level can, under certain circumstances, also be commissioned in the Navy, Marine Corps and Coast Guard Limited Duty Officer (LDO) program.

Clockwise from top left: U.S. combat operations in Ia Đrăng

ARVN Rangers defending Saigon during the 1968 Tết Offensive

Two A-4C Skyhawks after the Gulf of Tonkin incident

ARVN recapture Quảng Trị during the 1972 Easter Offensive

Civilians fleeing the 1972 Battle of Quảng Trị

Burial of 300 victims of the 1968 Huế Massacre

Vietnam War

Conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975.

Conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975.

Clockwise from top left: U.S. combat operations in Ia Đrăng

ARVN Rangers defending Saigon during the 1968 Tết Offensive

Two A-4C Skyhawks after the Gulf of Tonkin incident

ARVN recapture Quảng Trị during the 1972 Easter Offensive

Civilians fleeing the 1972 Battle of Quảng Trị

Burial of 300 victims of the 1968 Huế Massacre
The Geneva Conference, 1954
Ba Cut in Can Tho Military Court 1956, commander of religious movement the Hòa Hảo, which had fought against the Việt Minh, Vietnamese National Army and Cao Dai movement throughout the first war
Map of insurgency and "disturbances", 1957 to 1960
U.S. President Dwight D. Eisenhower and Secretary of State John Foster Dulles greet President Ngô Đình Diệm of South Vietnam in Washington, 8 May 1957
The Ho Chi Minh trail, known as the Truong Son Road by the North Vietnamese, cuts through Laos. This would develop into a complex logistical system which would allow the North Vietnamese to maintain the war effort despite the largest aerial bombardment campaign in history
The Ho Chi Minh trail required, on average, four months of rough-terrain travel for combatants from North Vietnam destined for the Southern battlefields.
President Kennedy's news conference of 23 March 1961
South Vietnam, Military Regions, 1967
Kennedy and McNamara
ARVN forces capture a Viet Cong
Ngô Đình Diệm after being shot and killed in a coup on 2 November 1963
Viet Cong fighters crossing a river
A U.S. B-66 Destroyer and four F-105 Thunderchiefs dropping bombs on North Vietnam during Operation Rolling Thunder
ARVN Forces and a US Advisor inspect a downed helicopter, Battle of Dong Xoai, June 1965
A Marine from 1st Battalion, 3rd Marines, moves a suspected Viet Cong during a search and clear operation held by the battalion 15 mi west of Da Nang Air Base, 1965.
Peasants suspected of being Viet Cong under detention of U.S. Army, 1966
Heavily bandaged woman burned by napalm, with a tag attached to her arm which reads "VNC Female" meaning Vietnamese civilian
A US "tunnel rat" soldier prepares to enter a Viet Cong tunnel.
Viet Cong soldier crouches in a bunker with an SKS rifle
ARVN forces assault a stronghold in the Mekong Delta.
Viet Cong before departing to participate in the Tet Offensive around Saigon-Gia Dinh
North Vietnamese regular army forces
The ruins of a section of Saigon, in the Cholon neighborhood, following fierce fighting between ARVN forces and Viet Cong Main Force battalions
Soviet Premier Alexei Kosygin with U.S. President Lyndon B. Johnson at the Glassboro Summit Conference where the two representatives discussed the possibilities of a peace settlement
Propaganda leaflet urging the defection of Viet Cong and North Vietnamese to the side of the Republic of Vietnam
ARVN and US Special Forces, September 1968
An alleged Viet Cong captured during an attack on an American outpost near the Cambodian border is interrogated.
Pathet Lao soldiers in Vientiane, 1972
Soviet advisers inspecting the debris of a B-52 downed in the vicinity of Hanoi
American POWs recently released from North Vietnamese prison camps, 1973
Civilians in a NVA/Viet Cong controlled zone. Civilians were required to show appropriate flags, during the War of the flags
Memorial commemorating the 1974 Buon Me Thuot campaign, depicting a Montagnard of the Central Highlands, a NVA soldier and a T-54 tank
The capture of Hue, March 1975
Victorious PAVN troops at the Presidential Palace, Saigon
Anti-war demonstration in the US, 1967
Ho Chi Minh from the Việt Minh independence movement and Việt Cộng with East German sailors in Stralsund harbour, 1957
Leonid Brezhnev (left) was the Soviet Union's leader during the Vietnam War.
Soviet anti-air instructors and North Vietnamese crewmen in the spring of 1965 at an anti-aircraft training center in Vietnam
Vietnam People's Air Force pilots walk by their aircraft, the MiG-17. The development of the North Vietnamese Vietnam People's Air Force (VPAF) during the war was assisted by Warsaw Pact nations throughout the war. Between 1966 and 1972 a total of 17 flying aces was credited by the VPAF against US fighters.
Fidel Castro meeting with Võ Nguyên Giáp at the Vietnam Military History Museum
East German solidarity stamp depicting a Vietnamese mother and child with the text "Unconquerable Vietnam"
The Thai Queen's Cobra battalion in Phuoc Tho
An Australian soldier in Vietnam
Victims of the My Lai massacre
Napalm burn victims during the war being treated at the 67th Combat Support Hospital
Interment of victims of the Huế Massacre
Da Nang, South Vietnam, 1968
A nurse treats a Vietnamese child, 1967
Female Viet Cong guerrilla in combat
Master-Sergeant and pharmacist Do Thi Trinh, part of the WAFC, supplying medication to ARVN dependents
Memorial temple to Nguyễn Thị Định and the female volunteers of the Viet Cong whom she commanded. They came to call themselves the "Long-Haired Army".
A wounded African-American soldier being carried away, 1968
Guerrillas assemble shells and rockets delivered along the Ho Chi Minh Trail.
UH-1D helicopters airlift members of a U.S. infantry regiment, 1966
North Vietnamese SAM crew in front of SA-2 launcher. The Soviet Union provided North Vietnam with considerable anti-air defence around installations.
Bombs being dropped by the B-52 Stratofortress long-range strategic bomber.
B-52 wreckage in Huu Tiep Lake, Hanoi. Downed during Operation Linebacker II, its remains have turned into a war monument.
Vietnamese refugees fleeing Vietnam, 1984
A bombed Buddha statue in Laos. U.S. bombing campaigns made Vietnam the single most bombed country in history.
Captured U.S.-supplied armored vehicles and artillery pieces
A young Marine private waits on the beach during the Marine landing, Da Nang, 3 August 1965
A marine gets his wounds treated during operations in Huế City, in 1968
Secretary of Defense Robert McNamara and General Westmoreland talk with General Tee on conditions of the war in Vietnam.
U.S. helicopter spraying chemical defoliants in the Mekong Delta, South Vietnam, 1969
Handicapped children in Vietnam, most of them victims of Agent Orange, 2004
Cemetery for ten unmarried girls who volunteered for logistical activities, who died in a B-52 raid at Đồng Lộc Junction, a strategic junction along the Ho Chi Minh trail
Stone plaque with photo of the "Thương tiếc" (Mourning Soldier) statue, originally, installed at the Republic of Vietnam National Military Cemetery. The original statue was demolished in April 1975.

The primary military organizations involved in the war were the United States Armed Forces and the Army of the Republic of Vietnam, pitted against the People's Army of Vietnam (PAVN) (commonly called the North Vietnamese Army, or NVA, in English-language sources) and the National Front for the Liberation of South Vietnam (NLF, more commonly known as the Viet Cong (VC) in English language sources), a South Vietnamese communist guerrilla force.

The official history of the United States Army noted that "tactics have often seemed to exist apart from larger issues, strategies, and objectives. Yet in Vietnam the Army experienced tactical success and strategic failure... success rests not only on military progress but on correctly analysing the nature of the particular conflict, understanding the enemy's strategy, and assessing the strengths and weaknesses of allies. A new humility and a new sophistication may form the best parts of a complex heritage left to the Army by the long, bitter war in Vietnam."

Newly graduated and commissioned officers of the Naval Reserve Officers Training Corps (NROTC) Unit Hampton Roads stand at attention as they are applauded during the spring Commissioning Ceremony in May 2004

Reserve Officers' Training Corps

Newly graduated and commissioned officers of the Naval Reserve Officers Training Corps (NROTC) Unit Hampton Roads stand at attention as they are applauded during the spring Commissioning Ceremony in May 2004
The Western Union Building at the College of William and Mary, site of the college's Army ROTC offices.
ROTC at the University of Florida during the 1920s
Oscar K. Chamber, the first African American ROTC graduate at Arlington State College, 1965
An Army ROTC unit practicing rappelling from a parking garage in September 2010
Army ROTC cadets on a field training exercise in March 2005
Arlington State College ROTC students firing a mortar during a field exercise, circa 1950s

The Reserve Officers' Training Corps (ROTC) is a group of college- and university-based officer training programs for training commissioned officers of the United States Armed Forces.

In 2020, ROTC graduates constituted 70 percent of newly commissioned active-duty U.S. Army officers, 83 percent of newly commissioned U.S. Marine Corps officers (through NROTC), 61 percent of newly commissioned U.S. Navy officers and 63 percent of newly commissioned U.S. Air Force officers, for a combined 56 percent of all active-duty officers in the Department of Defense commissioned that year.