| AEF |
American Expeditionary Force |
| ANZAC |
Australia New Zealand Army Corps |
| BE |
Bleriot Experimental |
| BEF |
British Expeditionary Force |
| BOH |
British Official History |
| CFS |
Central Flying School |
| C-in-C |
Commander-in-Chief |
| CIGS |
Chief of the Imperial General Staff |
| CO |
Commanding Officer |
| CWC |
Clyde Workers Committee |
| DH |
De Havilland |
| DMO | Director of Military Operations |
| DMT |
Director of Military Training |
| DSD |
Director of Staff Duties |
| DSO |
Distinguished Service Cross |
| FE |
Farman Experimental |
| FM |
Field Marshal |
| GHQ | General Headquarters |
| GPO |
General Post Office |
| GSO | General Staff Officer |
| HE |
High Explosives |
| HM |
His Majesty |
| HQ |
Headquarters |
| IWM |
Imperial War Museum |
| LI |
Light Infantry |
| MC |
Military Cross |
| MGRA |
Major General Royal Artillery |
| NCO | Non-Commissioned Officer |
| OHL |
Oberste Heeresleitung |
| OTC |
Officer Training Corps |
| PM |
Prime Minister |
| psc | passed Staff College |
| RAF |
Royal Air Force |
| RAMC |
Royal Army Medical Corps |
| RE |
Reconnaissance Experimental |
| RFA |
Royal Field Artillery |
| RFC |
Royal Flying Corps |
| RNAS |
Royal Naval Air Service |
| RQMS | Regimental Quarter Master Sergeant |
| SE |
Santos or Scouting Experimental |
| SS |
Stationery Stores (War Office) |
| SWB |
South Wales Borderers |
| TF | Territorial Force |
| TNA | The National Archives |
| TNT | Trinitrotoluene |
| VC | Victoria Cross |