main headquarters

headquarters and headquarters battery / company / detachment / troop (HHB / HHC / HHD/ HHT)

headquarters and headquarters battalion (HHBN)

main defense area (line) / main defensive position

main tank/ main fuel tank

main gear box / main rotor transmission

main rotor transmission / main gear box

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

active component headquarters

battery headquarters

combined headquarters/staff

command headquarters

company headquarters

Corps Support Command Headquarters (COSCOM HQ)

division headquarters

division traffic control headquarters

general headquarters (GHQ)

general headquarters reserve artillery

Government Communications Headquarters (GCHQ)

headquarters (HQ, H.Q.)

headquarters and service battery

headquarters battery

headquarters company

headquarters company and band

headquarters echelon

headquarters landing craft

headquarters light scout car

headquarters nucleus

headquarters rear echelon net

headquarters section

higher headquarters (HHQ)

intermediate headquarters