1LT - First Lieutenant

2LT - Second Lieutenant

ABN - Airborne

AD - Active Duty

ARNG - Army National Guard

BN - Battalion

CAV -Cavalry

CBI - China Burma India

CDR - Commander

CO - Company

COL - Colonel

CONARC- Continental Army Command

CPL - Corporal

CPT - Captain

DUI - Distinguished Unit Insignia

ETO - European Theater of Operations

INF - Infantry

LTC - Lieutenant Colonel

LTG - Lieutenant General

MAJ - Major

MACV-Military Assistance Command Vietnam

MACV-CSD-PRU - Military Assistance Command, Vietnam – Combined Studies Division – Provincial Reconnaissance Unit

MACVSOG - Military Assistance Command Vietnam Studies and Observation Group

NG - National Guard

NGB - National Guard Bureau

ODA - Operational Detachment Alpha

OG - Operational Group

OSS - Office of Strategic Services

PIR - Parachute Infantry Regiment

PTO - Pacific Theater of Operations

PVT - Private

PFC - Private First Class

SFG - Special Forces Group

SFOD - Special Forces Operational Detachment

SFC - Sergeant First Class

SGM - Sergeant Major

SGT - Sergeant

SPC - Specialist

SSG - Staff Sergeant

TO&E - Troops, Organization and Equipment

XO - Executive Officer