Armed Forces - a2a3 - British Army - Command and Organisation - Staff Branches - G1, G2, G3, G4



The staff branches that you would expect to find at every military headquarters from The Ministry of Defence (MoD) down to Brigade level are as follows:


Usually a General (or Brigadier), who commands the formation.

Chief of Staff

The officer who runs the headquarters on a day-to-day basis and who often acts as a second-in-command. Generally know as the COS.

G1 Branch

Responsible for personnel matters including manning, discipline and personnel services.

G2 Branch

Responsible for intelligence and security.

G3 Branch

Responsible for operations, including staff duties, exercise planning, training, operational requirements, combat development & tactical doctrine.

G4 Branch

Logistics and quartering.

G5 Branch


G6 Branch Communications and IT
G7 Branch Training
G8 Branch Resource Management (Finance and Contracts)
G9 Branch CIMIC (Civil affairs and co-operation with other agencies)

Note: 'Commander' - The senior officer in a large headquarters could be an Admiral, General or Air Marshal. The Army often refers to the commander as the GOC (General Officer Commanding), the Royal Air Force to the AOC (Air Officer Commanding) while the Royal Navy uses the term Flag Officer.