BC Battlecruiser - Lightly armored battleship, served as a fast convoy attack ship, but can be used in the same role as a BB in HoI4. BBB Super heavy battleship - Heavily armored and gunned battleship, sometimes designated as SHBB. BB Battleship - Most powerful type of ship equipped with guns. AT Anti-tank - Designates units with a high hard attack and piercing value, can be artillery or self-propelled. ART Artillery, including support, line, or self-propelled (see also SPxx). ASW Anti-submarine warfare - the use of ships and planes to find and destroy enemy submarines. ARM Armor, including light (LARM), medium (MARM), heavy (HARM), and super-heavy (SHARM) varieties.

APC Armored Personnel Carrier - an armored fighting vehicle for carrying infantry soldiers in combat or Armor Piercing Capped - an armor piercing shell type used in anti-tank guns and naval guns. AI Artificial intelligence - What controls all nations that are not being played by humans. AAR After action report - A player's recounting of their game. AH Alternate History, Austria-Hungary or Adolf Hitler. AC Armored Car - wheeled (not tracked) lightly armored military vehicle typically used for reconnaissance and security or Air Controller (the player that is responsible for all air wings in the same faction during a multiplayer game). AAA Anti-aircraft artillery - Artillery designed to shoot down enemy aircraft. Most common are state anti-air and divisional anti-air ( battalions or companies that use anti-air equipment such as Anti-aircraft artillery and Self-Propelled anti-air). Here are some of the common acronyms in the game and in discussions surrounding it:ДЄA Anti-air - Can be used in multiple contexts.

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