Letter A

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AA anti-aircraft
AAA Anti-aircraft artillery "Triple A"
AAAV Advanced Amphibious Assault Vehicle
AAD Armoured Amphibious Dozer
AAG Anti-aircraft gun
AARADCOM Army Armament Research and Development Command
AAV Amphibious Assault Vehicle
AB Airborne / Armored Brigade
ABC Atomic, Biological, Chemical (replaced by chemical, biological, radiological (CBR), and Nuclear, Biological, Chemical (NBC))
AB(C) Aviation Battalion (Combat)
ABM Air Bursting Munition
ABM Anti-ballistic missile
ABMS Air Bursting Munition System
ABSV Armoured Battlegroup Support Vehicle
A/C Aircraft commander
ACA Ammunition Container Assembly
ACCE Abrams/Crusader Common Engine
ACCV Armored Cavalry Cannon Vehicle
ACE Armored Combat Earthmover
ACH Advanced Combat Helmet (MICH TC-2000 Combat Helmet)
ACOG Advanced Combat Optical Gunsight
ACP Automatic Colt Pistol
ACR Advanced Combat Rifle
ACR Armored Cavalry Regiment
ACRV Armoured Command and Reconnaissance Vehicle
ACS Artillery Communications System
ACU Army Combat Uniform
ACV Aardvark Cleaning Vehicle
ACV Armoured Combat Vehicle
ACVT Armored Combat Vehicle Technology Program
ADA Air Defense Artillery
ADAM Area Denial Artillery Munition
ADAMS Air Defense Advanced Mobile System
ADATS Air Defence Anti-Tank System
ADC-A Assistant Division Commander - Fire and Maneuver
ADC-B Assistant Division Commander - Combat Support
ADEA Army Development and Employment Agency
AEF Allied Expeditionary Force
AESA Active Electronically Scanned Array
AEV armoured engineer vehicle
AF Air Force
AFA/ARA Aerial Field Artillery/Aerial Rocket Artillery
AFARV Armored, Forward Area, Re-arm Vehicle
AFAS Advanced Field Artillery System
AFCS Automatic Fire-Control Systems
AFD automatic feeding device
AFSC Air Force Specialty Code
AFSV Armoured Fire Support Vehicle
AFV Armoured fighting vehicle
AGC Automatic Gain Control
AGF Army Ground Forces
AGL Automatic Grenade Launcher
AGLS Automatic Gun Laying System
AGS Armored Gun System
AGV Assault Gun Vehicle
AGVT Advanced Ground Vehicle Technology
AHC Attack Helicopter Company
AICW Advanced Individual Combat Weapon
AIFS Advanced Indirect Fire System
AIFV armoured infantry fighting vehicle
AIPS Advanced Integrated Propulsion System
ALAAVS Advanced Light Armored/Amphibious Vehicle System
ALC Advanced Land Combat
ALICE All-Purpose Lightweight Individual Carrying Equipment
ALS Advanced Laying System
ALSV Armoured Logistics Support Vehicle
ALT Armoured Launching Turret
AMC Army Materiel Command
AMCCOM Armament Munitions and Chemical Command
AMOS Advanced Mortar System
AMR Anti-materiel rifle
AMRWS Advanced Multi-Role Weapon Station
AMS Armoured Mortar System
AMS-H Advanced Missile System - Heavy
AP Anti-Personnel / Armour-piercing
APC armoured personnel carrier
APERS anti-personnel
APG Aberdeen Proving Grounds
APGM Autonomous Precision-Guided Munition
APHC armour-piercing hard core
APHE armour-piercing high explosive
API armour-piercing incendiary
APM anti-personnel mine
APS Advanced Propulsion System
APS Artillery Pointing System
APV armoured patrol vehicle
AR Assault Rifle / armored regiment
AR/AAV Armored Reconnaissance/Airborne Assault Vehicle
ARD Anti-Reflective Device
ARDEC Armament Research, Development and Engineering Center
ARETS Armour Remote Target System
ARRADCOM Armament Research and Development Command
ARRV Armoured Repair and Recovery Vehicle
ARSV Armored Reconnaissance Scout Vehicle
ART Armoured Recon Transport
ARV armoured recovery vehicle or Armed Robotic Vehicle
ASA Advanced Security Agency
ASV Armored Security Vehicle
ASV ammunition supply vehicle
AT anti-tank
ATACS Advanced Tank Cannon System
ATAS Automatic Target Acquisition System
ATG Anti-tank gun
ATGL Anti-tank grenade launcher
ATGM Anti-tank guided missile
ATGW Anti-tank guided weapon
ATLAS Advanced Technology Light Artillery System
ATLV Artillery Target Location Vehicle
ATM Anti-tank mine
ATTC All Terrain Tracked Carrier
ATTS Air Transportable Towed System
ATV All-terrain vehicle
AVF Armoured Fighting Vehicle
AVH Armoured Vehicle Heavy
AVL Armoured Vehicle Light
AVLB armoured vehicle-launched bridge
AVM Armoured Vehicle Medium
AVR armoured vehicle reconnaissance
AVT Advanced Vehicle Technologies

ACB- Amphibious Construction Battalion.
ABLATS- Amphibious Bulk Lighterage And Transfer System

AA = Assembly Area ( or Alpha Alpha)
AO = Area of Operations

Two of the more commonly used terms at the operational level. Or used to be. AO is/was used in a generic basis as well. Meaning your immediate areas of work, or living, etc.."Square away your AO before recall formation" for example.

AHB - Assault Helicopter Battalion

AWACS - Airborne Warning and Control System

I though they also used:
ABN - Airborne Division

ABN is abbreviated for Airborne.
ABNDIV is Airborne Division


AAR is After Action Review

Darktrooper I thought AAR was After Action Report. or is that the old meaning?

Alpha - First letter of the military alphabet can refer to a unit, individual or location and possibly more.

AFATDS - Advanced Field Artillery Tactical Data System

Able506th wrote:Darktrooper I thought AAR was After Action Report. or is that the old meaning?

Its both, its used interchangeably.

AAV is also an abbreviation for Amphibious Assault Vest, part of USMC FSBE I system.

Thanks for the info.