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1,365,604 members•89,925 units
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Over 3,064,780 active members
1,365,604 members•89,925 units
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4002 HOSPITAL DETACHMENT
U.S. Army
4005TH USAH, 807TH MED BDE
U.S. Army
400th Chemical Laboratory
U.S. Army
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.
400TH MILITARY POLICE BATTALION
U.S. Army
400th MP EPW Camp
U.S. Army
4013th Garrison
U.S. Army
401st CA
U.S. Army
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.
401st Chemical Co
U.S. Army
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.
401ST CIVIL AFFAIRS
U.S. Army
401st Engineers
U.S. Army
The 401st Engineer Battalion was first constituted during World War II as part of the U.S. Army, organized to provide critical engineering support in the European Theater. The unit was instrumental in constructing bridges, clearing obstacles, and enabling mobility for Allied forces during major operations, including the advance through France and into Germany. After the war, the 401st Engineers continued to serve in various capacities, supporting both combat and humanitarian missions during the Cold War and into the 21st century. Today, the battalion remains a vital component of Army engineering efforts, contributing to both domestic and overseas missions.
401st MP Camp
U.S. Army
401st TRANS CO.
U.S. Army
402
U.S. Army
402 TRANSPORTATION COMPANY
U.S. Army
402 transportion. VN
U.S. Army
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.
402ND MILITARY POLICE
U.S. Army
403 CA BN
U.S. Army
403 CSH
U.S. Army
403 rd Trans CO
U.S. Army
403rd Civil Affairs
U.S. Army
403RD COMBAT SUPPORT
U.S. Army
403RD CTC
U.S. Army
403RD TANSPORTATION
U.S. Army
403rd Transportation Unit, Ft. Bragg N.C.
U.S. Army