- Anti-aircraft artillery, any gun used for air defense including machine guns of various types to heavy anti-aircraft guns.
- ACE report
- Ammo, Casualties & Equipment Report, a quick report given to the next-higher element leader regarding your element's status. Includes information like ammo supply, number of casualties, and equipment lost.
- Armored Personnel Carrier, a type of armored fighting vehicle designed to transport infantry to the battlefield.
- Armour-Piercing Fin-Stabilized Discarding-Sabot, a type of kinetic energy penetrator that uses kinetic energy to penetrate a target.
- Anti-Tank Guided Missile, a guided missile primarily designed to hit and destroy heavily armored military vehicles.
- Bail out
- All players in a vehicle will exit the vehicle on this command. This is considered to be an emergency command and is repeated three times to ensure that everyone in the vehicle hears it.
- Pilot statement to indicate that the aircraft must immediately return to base in order to make it back before fuel runs out.
- Crewman, CAS aircraft, etc. cannot spot friendly positions.
- Close Air Support, aircraft specialized at ground attack and are designed to provide excellent close support to infantry. Are typically directed by a Forward Air Controller (FAC).
- Casualty report, a quick and focused report that is designed so that a leader can quickly find out how many casualties have been taken.
- Cease fire
- Used to cause a temporary lull in the shooting. Cease fire is used when all enemy are seemingly dead and no further shooting is necessary.
- Check fire
- A "Check fire" command is given when it is suspected that a friendly unit is being fired upon by friendlies.
- Standard acknowledgement. Example: "Bravo, enemy armor headed your way from the north." "Bravo copies."
- Combat Search And Rescue. Refers to operations carried out to locate and recover the pilots and crews of aircraft which have been shot down.
- Danger close
- In close air support, artillery, mortar, and naval gunfire support fires, it is the term included in the method of engagement segment of a call for fire which indicates that friendly forces are within close proximity of the target. The close proximity distance is determined by the weapon and munition fired.
- Players who are not driving or gunning on a vehicle will exit the vehicle on this command.
- Explosive Ordinance Disposal. Refers to the person or team of people who clear out mines and explosives to allow ground forces to safely move through an area.
- Explosive Reactive Armor, a type of vehicle armor that explodes in reaction to the impact of a weapon to reduce the damage done to the vehicle being protected. See also "Reactive armor" below.
- Forward Air Controller, a player who is tasked with coordinating air elements in the support of ground forces and frequently is assigned to the company headquarters element.
- Frag grenade
- Fragmentation grenade, a grenade designed to kill through blast and shrapnel effects. Usually on a 4-5 second time delay fuse.
- Forward Area Refueling/Rearming Point or Forward Arming Refueling Point, a space on the battlefield designated for the re-arming and re-fueling of aircraft.
- Fast-moving fixed-wing aircraft.
- Forward Observer, a player who is tasked with coordinating artillery support for the platoon.
- Brevity code used by NATO pilots to signal the release of an air-to-air munition. Fox One - indicates the launch of a semi-active radar guided missile. Fox Two - Indicates the launch of an infrared-guided missile. Fox Three - Indicates the launch of an active radar guided missile. Fox four - Historical term indicating air-to-air or air-to-surface cannon fire. Current usage is Guns, guns, guns.
- Frag out!
- Warning call given when throwing a grenade.
- Follow-Through-Grenade, a munition that blows a hole in a wall and then projects and explodes an additional charge on the far side, causing additional casualties. 
- Fucked Up Beyond All Recognition/Repair/Reason, military slang.
- Go, go, go!
- Passengers of a helo disembark at this command from their element leader or the aircraft crew. This can also be used when mounting up into a helicopter during an extraction. In that situation, the senior element leader confirms that his troops are loaded and accounted for, then says "Go, go, go!" to indicate to the helo pilot that he should take off. Finally, it can be used to signal the start of a paradropping sequence from a helicopter of airplane.
- Warning call given when an enemy grenade has been thrown at friendlies, a grenade is fumbled or anything else that poses a close-in grenade threat.
- Guns, guns, guns
- Brevity code used by NATO pilots to signal cannon fire. Historically called Fox Four.
- High Altitude, High Opening, a paradrop whereas the chute is deployed at a high altitude allowing for substantial ground to be covered during flight.
- High Altitude, Low Opening, a paradrop whereas the chute is deployed at a low altitude to minimize the time spent under canopy.
- High Explosive, explosives that kill via blast and fragmentation effects.
- High Explosive Anti-Armor, munitions ideal for defeating medium and heavy armor. Deals very little area damage but a great deal of anti-armor damage.
- High-Explosive Anti-Tank, a warhead made of an explosive shaped charge that used the Munroe effect to create a very high-velocity partial stream of metal in a state of superplasticity that can punch through solid armor.
- High Explosive Dual Purpose, munitions effective against light armor, walls, structures, bunkers, etc. Does a significant amount of area damage and a fair amount of anti-armor damage
- Used to control movement. "Hold" is ordered when a unit needs to make a temporary halt.
- Heads-up display, A display of flight, navigation, attack, or other information superimposed upon the pilot’s forward field of view.
- Improvised explosive device, a homemade bomb constructed and deployed in ways other than in conventional military action.
- Individual First Aid Kit, a first aid kit used to treat an individual soldier's wounds, single-use and stored within bright yellow wrappers.
- Infantry Fighting Vehicle, a type of armored fighting vehicle used to carry infantry into battle and unlike an APC, also provide fire support.
- Incoming / IDF / Indirect
- Warning calls given when enemy indirect fire (grenade launchers, motors, artillery, etc.) is inbound on friendly positions. IDF is pronounced "Eye dee eff."
- Joint Direct Attack Munition, a pinpoint bomb guidance device that can be strapped to a gravity bomb thus converting dumb bombs into smart bombs.
- Joint Terminal Attack Controller, a person who directs close air support, usually an infantryman with a laser designator to guide target-seeking bombs, missiles and artillery rounds to their targets.
- Light Strike Vehicle, unarmoured light attack vehicles designed for fast hit-and-run raids, scouting missions, special forces support and low-intensity guerrilla warfare.
- Main Battle Tank, a tank that fills the heavy direct fire role of many modern armies.
- Mount up / Remount
- Command given to order players to mount into their assigned vehicles. "Remount" is sometimes given after players have temporarily dismounted, such as when providing security at a halt.
- Military Operations in Urban Terrain, also referred to as urban warfare, is combat conducted in urban areas such as towns and cities.
- Mine Resistant Ambush Protected, a term for vehicles that are designed specifically to withstand improvised explosive device (IED) attacks and ambushes.
- Novel Explosive, munitions that uses thermobaric principles to cause extreme blast and pressure damage around their point of destruction. Very effective against infantry and buildings.
- No joy
- Crewman, CAS aircraft, etc. cannot spot hostile targets.
- Command by the element leader to tell his element members to form up on him and follow him.
- OPposing FORce, name for hostile forces. In the Arma series it is a generic term to describe REDFOR factions. It was also referred to as "East" in ArmA: Cold War Assault.
- Oscar Mike
- On the Move, the names of the two NATO phonetic alphabet letters O and M, which stand for the phrase. Used on the radio and in shorthand to each other.
- A quick reaction force. Essentially, a team which is kept on standby and stays prepared to rapidly provide assistance at several different locations if any of them fall under attack.
- Reactive armor
- A type of vehicle armour that reacts in some way to the impact of a weapon to reduce the damage done to the vehicle being protected. It is most effective in protecting against shaped charges and specially hardened long rod penetrators.
- Remote Anti-Armor Mines, a type of artillery round used by 155mm howitzers that spreads over a 400 meter area, arms shortly after impact and triggers when an armored vehicle runs over them.
- This is a simple affirmative acknowledgement. If told to watch the NW by your fireteam leader, you should sound off with a quick "Roger" to let him know that you heard him and are complying.
- Rules of Engagement, the guidelines leaders issue to govern the employment of their troops' personal weapons.
- Sense-and-Destroy Armor, a type of third-generation 155mm artillery round that when deployed, releases two sensor-fuzed munitions which parachute over the battlespace and scan (using radar and infrared) for suitable armor targets.
- Say again
- The prior message was not understood - say it again. Example "Alpha, say again your last?"
- Small arms
- Man portable, individual, and crew-served weapon systems used mainly against personnel and lightly armored or unarmored equipment.
- Shoulder-Launched Multipurpose Assault Weapon, a should-launched rocket weapon with the primary ability to be a portable assault weapon and a secondary anti-armor rocket launcher.
- Situation report, a concise and quick method for an entire element to report their status to their leader.
- Stand by
- This acts as either a wait request or a preparatory command. When used as a preparatory command, it is a warning to anyone listening that an important event is about to happen, typically one which other players will need to participate in. When used as a wait request, it is a way to tell the person asking a question that they need a few moments to get the answer.
- Sport Utility Vehicle, a vehicle similar to a station wagon and usually equipped with four-wheel drive for on- or off-road ability.
- Crewman, CAS aircraft, etc. has spotted hostile targets.
- Unmanned Aerial Vehicle, aircraft without a human pilot aboard (either controlled via remote control by a human operator or onboard computers). Also known as drones.
- Unmanned Combat Aerial Vehicle, unmanned aerial vehicles that usually carry aircraft ordnance such as missiles or bombs. Also known as combat drones.
- Unmanned Ground Vehicle, land-based counterpart to unmanned aerial vehicles that operate without an onboard human driver (either remotely operated or fully autonomous). Also known as drones.
- Unmanned Ground Combat Vehicle, unmanned ground vehicles that are armed with guns and other heavy weapons. Also known as combat drones.
- Crewman, CAS aircraft, etc. has spotted friendly positions.
- Voice over Internet Protocol, a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.
- Voice-Over-Net, a type of communication whereas voice is transmitted over ArmA's network or servers. See VoIP above.
- Weapon dry / empty
- Used to indicate that the player's weapon is temporarily out of action due to running out of ammo in the current magazine.
- Short for "will comply." Typically used in conjunction with roger, so that it ends up as "Roger, wilco" which translates into "Understood, and I will comply with the order."
- Brevity term that an aircraft pilot or gunner is out of ammunition.
- White Phosphorous (Willy Pete), A type of munition that can be used for smoke concealment, marking or to cause incendiary effects.
- ↑ Kennedy Hickman, AAA, viewed 17 February 2014, <http://militaryhistory.about.com/od/glossaryofmilitaryterms/g/Aaa.htm>.
- ↑ 2.0 2.1 2.2 'Reports - SITREPs, CASREPS, & ACE reports' 2013, in Arma 3 Tactical Guide, pp. 119-120
- ↑ Wikipedia, Kinetic energy penetrator, viewed 16 February 2014, <http://en.wikipedia.org/wiki/Kinetic_energy_penetrator>.
- ↑ Wikipedia, Anti-tank missile, viewed 16 February 2014, <http://en.wikipedia.org/wiki/Anti-tank_missile>.
- ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 5.12 5.13 5.14 5.15 5.16 'Communication - brevity' 2013, in Arma 3 Tactical Guide, pp. 114-116
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 'Helicopters - helicopter crew roles' 2013, in Arma 3 Tactical Guide, pp. 241-242
- ↑ 'Fixed wing - types of fixed-wing aircraft' 2013, in Arma 3 Tactical Guide, pp. 253
- ↑ 8.0 8.1 8.2 'Terms and definitions' 2010, in DOD Dictionary of Military and Associated Terms, pp. 65, 115, 241
- ↑ 9.0 9.1 Wikipedia, Reactive armor, viewed 17 February 2014, <http://en.wikipedia.org/wiki/Reactive_armour>.
- ↑ 10.0 10.1 'The company - company HQ roles' 2013, in Arma 3 Tactical Guide, pp. 88-89
- ↑ 'Common Skills - grenades' 2013, in Arma 3 Tactical Guide, pp. 62
- ↑ 12.0 12.1 12.2 Wikipedia, List of United States Marine Corps acronyms and expressions, viewed 16 February 2014, <http://en.wikipedia.org/wiki/List_of_United_States_Marine_Corps_acronyms_and_expressions>.
- ↑ 13.0 13.1 Wikipedia, Fox (code word), viewed 16 February 2014, <http://en.wikipedia.org/wiki/Fox_(code_word)>.
- ↑ 14.0 14.1 14.2 14.3 'Crew-served Weapons - anti-armor' 2013, in Arma 3 Tactical Guide, pp. 108
- ↑ Wikipedia, Military slang, viewed 16 February 2014, <http://en.wikipedia.org/wiki/Military_slang>.
- ↑ 16.0 16.1 'Paratroopers - parachuting' 2013, in Arma 3 Tactical Guide, pp. 300-301
- ↑ 17.0 17.1 'Crew-served Weapons - indirect-fire teams' 2013, in Arma 3 Tactical Guide, pp. 104
- ↑ Wikipedia, High-explosive anti-tank warhead, viewed 16 February 2014, <http://en.wikipedia.org/wiki/High-explosive_anti-tank_warhead>.
- ↑ 'Combat lifesaver - wound effects' 2013, in Arma 3 Tactical Guide, pp. 53
- ↑ The Free Dictionary, JDAM, viewed 16 February 2014, <http://www.thefreedictionary.com/JDAM>.
- ↑ Wikipedia, Urban warfare, viewed 16 February 2014, <http://en.wikipedia.org/wiki/Urban_warfare>.
- ↑ 22.0 22.1 'Working with artillery - artillery rounds & fusing 101' 2013, in Arma 3 Tactical Guide, pp. 290
- ↑ 'Combat marksmanship - every player a rifleman first' 2013, in Arma 3 Tactical Guide, pp. 31
- ↑ Wikipedia, Shoulder-launched Multipurpose Assault Weapon, viewed 16 February 2014, <http://en.wikipedia.org/wiki/Shoulder-launched_Multipurpose_Assault_Weapon>.
- ↑ Wikipedia, Sport utility vehicle, viewed 16 February 2014, <http://en.wikipedia.org/wiki/Sport_utility_vehicle>.
- ↑ Wikipedia, Voice over IP, viewed 17 February 2014, <http://en.wikipedia.org/wiki/Voice_over_IP>.