U.S. Army

The 3rd Infantry, Fife and Drum Corps—often referred to as "The Old Guard" Fife and Drum Corps—is a ceremonial unit of the United States Army based at Fort Myer, Virginia. Established in 1960, the Corps serves as the official musical escort to the President of the United States and is renowned for its performances in traditional Revolutionary War-era uniforms. As part of the 3rd U.S. Infantry Regiment, the Corps participates in a variety of national ceremonies, including presidential inaugurations, state arrivals, and military funerals at Arlington National Cemetery. Their distinctive music and precise marching preserve the Army’s colonial heritage and honor America’s military traditions.

The 3rd Maintenance Company is a key support unit within the U.S. Army, tasked with providing field-level maintenance and repair for a wide range of military vehicles and equipment. Activated during periods of major conflict, the company has supported various divisions, ensuring operational readiness during deployments in both peacetime and wartime environments. Over the years, the 3rd Maintenance Company has participated in numerous training exercises and overseas missions, playing a vital role in sustaining combat power. Its skilled soldiers and technicians continue to uphold a tradition of excellence, adapting to new technologies and challenges in modern military operations.

The 3rd Ordnance Company has a distinguished history of providing vital ammunition supply and maintenance support to U.S. Army operations. Originally constituted during World War II, the unit played a critical role in sustaining frontline combat elements with munitions and ordnance repair. Over the decades, the 3rd Ordnance Company participated in multiple major conflicts, including deployments during the Korean and Vietnam Wars. Today, the company continues to serve as a key logistical asset, ensuring the readiness and effectiveness of Army units worldwide.

The 3rd Psychological Operations Battalion (3rd POB) is a subordinate unit of the 4th Psychological Operations Group (4th POG), part of the U.S. Army's Psychological Operations (PSYOP) forces. Activated in the late 20th century, the 3rd POB specializes in disseminating information to influence the attitudes and behaviors of foreign audiences in support of U.S. military objectives. The battalion has supported numerous operations, including campaigns in the Balkans, Iraq, and Afghanistan, where its teams conducted information operations and counter-propaganda missions. Throughout its history, the 3rd POB has played a critical role in shaping the information environment and supporting both conventional and special operations forces worldwide.

The 3rd Transportation unit, originally constituted during World War II, has a distinguished history of providing vital logistics and transportation support to U.S. military operations worldwide. Activated in 1942, the unit played a crucial role in moving personnel, equipment, and supplies across the European Theater, supporting Allied advances. Over the decades, the 3rd Transportation has participated in major conflicts, including the Korean and Vietnam Wars, and more recent operations in the Middle East. Renowned for its adaptability and reliability, the unit continues to uphold its mission of ensuring rapid and efficient movement for the U.S. Army in both peacetime and combat environments.

The 3rd U.S. Army Missile Command (Air Transportable), often referred to in abbreviations, was established during the Cold War era to provide rapid-deployable missile support for the U.S. Army's Third Army. Its mission focused on operating and maintaining surface-to-surface and surface-to-air missile systems that could be quickly moved by air to forward positions, enhancing the Army’s ability to respond to threats across multiple theaters. The unit participated in numerous large-scale exercises, demonstrating the strategic value of air-transportable missile assets in both European and Middle Eastern contingencies. Throughout its service, the command contributed significantly to the deterrence posture of U.S. forces and the development of mobile missile doctrine before its eventual reorganization as missile technology and operational needs evolved.

The 3rd Battalion, 297th Infantry Regiment is a unit of the Alaska Army National Guard. Originally constituted in 1959, the 297th Infantry has a longstanding tradition of supporting both state and federal missions, including disaster relief and homeland security operations in Alaska. The 3rd Battalion has also contributed soldiers to overseas deployments, notably in support of the Global War on Terrorism in Iraq and Afghanistan. Its members are recognized for their adaptability and readiness, embodying the unique spirit and resilience required to serve in the challenging Alaskan environment.

The 4th Battalion, 39th Infantry Regiment (4/39th IN), was an integral unit of the 9th Infantry Division (9th ID) during the Vietnam War. Activated in 1966, the battalion deployed to Vietnam and conducted combat operations throughout the Mekong Delta region, participating in major campaigns such as the Tet Counteroffensive and Operation Speedy Express. The “Fighting Falcons” earned a reputation for tenacity and professionalism, engaging in both conventional and counterinsurgency missions. Following the drawdown of U.S. forces in Southeast Asia, the 4/39th Infantry was inactivated in 1970 as part of the division’s redeployment.

The 4th Battalion, 43rd Field Artillery Regiment (4/43rd FA) traces its roots to the 43rd Field Artillery, which was originally constituted in 1918. Reactivated and reorganized multiple times throughout its history, the 4/43rd FA has served in several key roles, including as part of the U.S. Army’s air defense artillery forces. The unit was notably stationed in Europe during the Cold War, supporting NATO operations and providing critical air defense against potential threats. Over the decades, 4/43rd FA has maintained a reputation for excellence, adapting to evolving technologies and mission requirements before eventual inactivation as part of post-Cold War force reductions.

The 4th Battalion, 62nd Artillery (4/62nd Arty) was a unit of the United States Army with a distinguished history dating back to its original constitution during World War II. Reactivated during the Vietnam War, the battalion served as a towed 105mm howitzer unit, providing crucial direct and general artillery support to U.S. and allied forces in Southeast Asia. The 4/62nd Arty participated in numerous operations, supporting infantry and armored units in challenging conditions and earning commendations for its accuracy and reliability under fire. After the Vietnam War, the battalion was eventually inactivated as part of the Army's post-war reorganization.

The 400th Chemical Laboratory was constituted during World War II as part of the U.S. Army’s Chemical Corps, tasked with supporting chemical warfare defense and analysis. Activated in 1943, the unit provided critical laboratory testing of chemical agents, protective materials, and decontamination procedures both in training environments and combat zones. Stationed primarily in the European Theater, the 400th played a key role in ensuring the safety and effectiveness of Allied chemical operations. After the war, the unit was inactivated as part of the postwar drawdown and restructuring of Army chemical units.

The 401st Civil Affairs Battalion (401st CA) is a unit of the United States Army Reserve specializing in civil-military operations. Activated during the post-Cold War period, the battalion has supported numerous missions, including peacekeeping, humanitarian assistance, and nation-building efforts in regions such as the Balkans, Iraq, and Afghanistan. The 401st CA provides expertise in governance, infrastructure, public health, and civil administration, working closely with both military commanders and local civilian populations. Over the years, its soldiers have played a key role in fostering stability, reconstruction, and cooperation in conflict and post-conflict environments worldwide.

The 401st Chemical Company is a unit within the United States Army specializing in chemical, biological, radiological, and nuclear (CBRN) operations. Established to provide decontamination, reconnaissance, and support in hazardous environments, the company has participated in numerous training exercises and deployments both domestically and abroad. Throughout its history, the 401st has supported missions ranging from homeland defense to overseas contingency operations, ensuring force protection and readiness against CBRN threats. The unit is recognized for its adaptability, technical proficiency, and commitment to safeguarding personnel and civilians from chemical and biological hazards.

The 402nd Transportation Battalion of the Republic of Vietnam (South Vietnam) was established during the Vietnam War to provide critical logistical and transport support to the Army of the Republic of Vietnam (ARVN). Operating primarily in the southern regions, the unit was responsible for the movement of troops, equipment, and vital supplies along key supply routes under challenging and often hostile conditions. The 402nd played a significant role in maintaining operational mobility and resupply for ARVN units engaged in combat operations. Despite facing threats from ambushes and sabotage, the battalion’s efforts were instrumental in sustaining military operations until the fall of Saigon in 1975.

The 404th Military Police Company is a distinguished unit within the United States Army Military Police Corps. Activated during the post-World War II period, the 404th has provided vital law enforcement, security, and combat support both at home and abroad. The company has participated in key operations, including deployments to Iraq and Afghanistan, where it performed convoy security, detainee operations, and base defense missions. Renowned for its professionalism and versatility, the 404th Military Police Company continues to uphold the Army values while supporting missions essential to national security.

The 40th Medical Detachment, also known as the 40th Med Det, was a U.S. Army medical unit primarily tasked with providing helicopter ambulance and aeromedical evacuation support. Activated during the Vietnam War, the unit played a crucial role in rapidly evacuating wounded soldiers from combat zones to field hospitals, significantly increasing survival rates. Operating UH-1 "Huey" helicopters, the 40th Med Detachment conducted thousands of life-saving missions under dangerous conditions. The dedication and bravery of its personnel earned the unit several commendations for valor and meritorious service.

The 417th Transportation unit was first activated during World War II to provide vital logistical support in the European Theater. Tasked with transporting troops, equipment, and supplies, the unit played a crucial role in sustaining Allied operations during major campaigns. After the war, the 417th was periodically reactivated and inactivated, adapting to new missions in support of U.S. military objectives worldwide. Today, the unit is recognized for its legacy of excellence in transportation and logistics within the U.S. Army.

The 418th Medical Company is a unit in the United States Army Reserve specializing in medical support and evacuation. Activated during World War II, the 418th provided essential medical services, including casualty evacuation and treatment, for frontline troops. Over the decades, the unit has supported numerous operations, including deployments in the Middle East during Operations Desert Storm, Iraqi Freedom, and Enduring Freedom. The 418th Med Company continues to play a vital role in ensuring the health and readiness of U.S. military forces through training, humanitarian missions, and combat support.

The 42nd Infantry Division Artillery (42 DIVARTY), also known as the "Rainbow" Division Artillery, was activated during World War I as part of the 42nd Infantry Division, one of the first National Guard divisions to serve in France. The unit provided crucial fire support during major campaigns such as the Champagne-Marne, Aisne-Marne, and Meuse-Argonne offensives. Reactivated for World War II, 42 DIVARTY supported the division's advance across France and into Germany, contributing to the liberation of Dachau concentration camp. After periods of inactivation, the unit has continued its legacy as a key artillery command within the Army National Guard, providing mission-ready fire support for domestic and overseas operations.

The 4225th United States Army Hospital (USAH) is a U.S. Army Reserve medical unit with a mission to provide medical support and hospital services during times of conflict or national emergency. Established in the mid-20th century, the 4225th USAH has participated in numerous training exercises and mobilizations, ensuring readiness to deliver critical care in both domestic and overseas operations. Throughout its history, the unit has supported various missions, including humanitarian assistance and disaster relief, alongside its wartime responsibilities. The 4225th USAH continues to uphold a tradition of excellence, adapting to evolving medical and military challenges to serve soldiers and civilians alike.

The 425th Personnel Services Company (PSC), based in Indianapolis, Indiana, has served as a key administrative support unit within the United States Army Reserve. Throughout its history, the 425th PSC has provided vital personnel services, including records management, casualty reporting, and postal operations, to support both domestic and overseas missions. The unit has been mobilized in support of operations such as Operation Iraqi Freedom and Operation Enduring Freedom, ensuring that deployed soldiers received critical administrative assistance. Renowned for its professionalism and dedication, the 425th PSC has played an essential role in maintaining the well-being and readiness of Army personnel.

The 426th Engineer Command was a unit of the United States Army Reserve, originally constituted during the post-World War II era to provide engineering support to active and reserve components. Throughout its service, the 426th Engineer Command specialized in construction, combat engineering, and logistical support, playing a crucial role in both training exercises and domestic operations. The unit participated in several major training maneuvers and provided critical infrastructure support during natural disaster relief missions within the United States. After decades of service, the 426th Engineer Command was eventually reorganized or inactivated as part of broader Army Reserve restructuring initiatives.

The 42nd Ambulance was a vital medical support unit formed during World War I as part of the British Army’s Royal Army Medical Corps. Tasked with providing frontline casualty evacuation and emergency medical care, the unit operated alongside the 42nd (East Lancashire) Division in major campaigns such as Gallipoli and the Western Front. Its members braved hazardous conditions to retrieve wounded soldiers from the battlefield and transport them to field hospitals. The 42nd Ambulance earned distinction for its dedication and resilience, contributing significantly to the division’s operational effectiveness throughout the war.

The 42nd Supply and Transportation (S&T) Battalion was a vital logistical unit in the U.S. Army, historically assigned to provide supply, maintenance, and transportation support to larger formations such as divisions or corps. Originally constituted during the Cold War era, the battalion played a key role in ensuring the rapid movement of materiel and personnel, particularly during training exercises and potential contingency operations in Europe. The 42nd S&T Battalion was known for its adaptability, supporting both peacetime operations and deployments. Over the years, its missions evolved with the Army’s transformation, with elements of the battalion often reflagged or reorganized to meet changing logistical requirements.