Short Version

Military Lingo –

so you do not get lost in what could be a brief long distance conversation:
AIT — Advanced Infantry Training; Advanced Individual Training

BCT — Basic Combat Training or Brigage Combat Team

CAV — Cavalry (Armored Cavalry Regiment)
FOB — Forward Operating Base; Forward Operations Base
HE — High-Explosive; Handling Equipment; Housing Expense; Heavy Equipment
IBCT — Infantry Brigade Combat Team
IED— Improvised Explosive Device
LBV — Load-Bearing Vest. Used for carrying ammunition, water, and

other tactical loads while in the field, or during an assault.
MEDEVAC— MEDical EVACuation to an aid station or field hospital, usually by air ambulance.
MOS— Military Occupational Specialty
MRE— Meals, Ready to Eat;

(slang: Meals Rejected/ Meals Refused by Everyone/ Meals Rejected by the Enemy)
PT — Physical Training

RPG — Rocket-Propelled Grenade