Abbreviations Used in Military Documents and for Medal Inscriptions - Abbreviations: R
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R |
|
| R | Railways, Royal, Regina, King or Queen (Rex), Royal, River, Regiment(al), Reserve, Regular, Requisition(ed) |
| R & D | Research and Development |
| R & SRV | Roxburgh & Selkirk Rifle Volunteers |
| R 1-DEVON YEO | Royal 1st Devonshire Yeomanry |
| R ADMIRAL, REAR ADMIRAL, RKMS (Indian Army) | Rear Admiral |
| R ANGLIAN, RANGLIANR | Royal Anglian Regiment |
| R CAN H ART, RCHA | Royal Canadian Horse Artillery |
| R CAN R | Royal Canadian Regiment |
| R CAN SIG ENG | Royal Canadian Signal Engineers |
| R DEVON YEO | Royal Devon Yeomanry |
| R DUB FUS | Royal Dublin Fusiliers |
| R E KENT YEO | Royal East Kent Yeomanry |
| R FUS | Royal Fusiliers |
| R GUERNSEY ART | Royal Guernsey Artillery |
| R GUERNSEY E | Royal Guernsey Engineers |
| R GUERNSEY LI | Royal Guernsey Light Infantry |
| R H GDS, RHG | Royal Horse Guards (Blues) |
| R HIGHRS | Royal Highlanders |
| R INNIS F, R INNIS FUS, R INNISKS | Royal Inniskilling Fusiliers |
| R IR REG, R IRISH, R IRISH REGT | Royal Irish Regiment |
| R IR RIF | Royal Irish Rifles |
| R JAT LI | Royal Jat Light Infantry |
| R JERSEY ART | Royal Jersey Artillery |
| R LANC R, R LANCR | Royal Lancaster Regiment |
| R MALTA A | Royal Malta Artillery |
| R MUN FUS, R MUNS FUS | Royal Munster Fusiliers |
| R N DEVON YEO | Royal North Devonshire Yeomanry |
| R NEWF'D R | Royal Newfoundland Regiment |
| R NORF R | Royal Norfolk Regiment |
| R NORTH'D FUS | Royal Northumberland Fusiliers |
| R of O | Reserve of Officers |
| R SIGNALS, R SIGS | Royal Corps of Signals |
| R TANK R | Royal Tank Regiment |
| R W KENT R | Royal West Kent Regiment |
| R WAR, R WAR R | Royal Warwickshire Regiment, Royal Warwickshire Fusiliers |
| R WDMR, RES WDMSTR | Reserve Wardmaster |
| R WILTS YEO, RWILTSY, RWY | Royal Wiltshire Yeomanry (Prince of Wales's Own) |
| R&A | Rations and Allowances |
| R&D | Redesignated & Disbanded Units |
| R&DU | Redesignated and Disbanded Units |
| R&I | Repair & Inspection |
| R&ISEC | Research & Information Section |
| R&Q | Rations & Quarters |
| R&SofS | Remission & Suspension of Sentence |
| R/A | Radio Acoustic |
| R/C, RC | Release Centre |
| R/S/L | Returned Sailing List |
| R/T | Radio Telephony |
| R1STDY | Royal 1st Devon Yeomanry |
| R22eR, R22R | Royal 22e Regiment |
| RA | Royal Artiller, Rear Admiral, Radio Artificer, Radio Technician (Air), Rations, Regiment of Artillery |
| R-A | Rear-Admiral |
| RA 3rd BS | Rear Admiral Third Battle Squadron |
| RA CH | Royal Army Chaplains |
| RA(A) | Rear Admiral Aircraft Carriers |
| RA(M) | Rear Admiral (Minelayers) |
| RA(No) | Rear Admiral (Number) Battle Squadron |
| RA(V) | Rear Admiral (''V'' Force) |
| RA, 1c (or 2c,3c,4c,5c) | Radio Artificer, 1st Class (or 2nd,3rd,4th or 5th Class) |
| RAA | Royal Australian Artillery |
| RAAF | Royal Australian Air Force |
| RAAFLO | Royal Australian Air Force London Office |
| RAAFNS | Royal Australian Air Force Nursing Service |
| RAAMC | Royal Australian Army Medical Corps |
| RAANC | Royal Australian Army Nursing Corps |
| RAC | Royal Armoured Corps, Royal Automobile Club |
| RACH | Royal Army Chaplains' Department, Royal Army Clothing Department |
| RAChD | Royal Army Chaplain's Department |
| RACOB (WA) | Rear Admiral Combined Operations Bast (Western Approaches) |
| RAD | Rear Admiral Destroyers |
| RADC | Royal Army Dental Corps |
| RadNav | Radio Navigator |
| RadOp | Radio Operator |
| RadSea | Radioman (Sea) |
| RadTech | Radio Technician |
| RAE | Royal Aircraft Establishment, Radio Equipment Assistant, Royal Australian Engineers |
| RAEC | Royal Army Education Corps |
| RAECEF | Rear Admiral Escort Carriers Eastern Fleet |
| RAEFAC | Rear Admiral Eastern Fleet Aircraft Carriers |
| RAF | Royal Air Force |
| RAFA | Royal Australian Field Artillery |
| RAFVR | Royal Air Force Volunteer Reserve |
| RAG | Rifles Armoury Guards |
| RAGA | Royal Australian Garrison Artillery |
| Ragr | Radiographer |
| RAJPUTS | Rajputs |
| RALSU | Rear Admiral Landing Ships Unallocated |
| RAMC | Royal Army Medical Corps |
| RAMCO | Royal Army Medical Corps Officers |
| RAN | Royal Australian Navy |
| RANAS(IO) | Rear Admiral Naval Air Stations (Indian Ocean) |
| RANBT | Royal Australian Naval Bridging Train |
| RANC | Royal Australian Naval College |
| RAND INTELL C | Rand Intelligence Corps |
| RAND RFLS, RAND RIF | Rand Rifles |
| RANGERS | Royal Irish Rangers, Connaught Rangers |
| RANNS | Royal Australian Navy Nursing Service |
| RANR | Royal Australian Navy Reserve |
| RANVR | Royal Australian Naval Volunteer Reserve |
| RAO | Royal Artillery Officers |
| RAOC | Royal Army Ordnance Corps |
| RAOCO | Royal Army Ordnance Corps Officers |
| RAP | Regimental Aid Post |
| RAPC | Royal Army Pay Corps |
| RAPD | Royal Army Pay Department |
| RAPWI | Recovered Allied Prisoners of War and Internees |
| RAR | Rhodesian African Rifles, Royal Australian Regiment |
| RASC | Royal Army Service Corps |
| RASpec | Recreation and Athletic Specialist |
| RATE | Rear Admiral Training Establishments |
| RAVC | Royal Army Veterinary Corps |
| RB | Rifle Brigade (Prince Consort's Own) |
| RB(IC) | Reconnaissance Battalion (In Canada) |
| RBAA | Reserve Brigade Australian Army |
| RBERKS, RBerksR, RBR | Royal Berkshire Regiment |
| RBH | Royal Bucks Hussars |
| RC | Recruiting Centre(s), Release Centre(s), Re-Selection Centre(s), Roman Catholic, Royal Canadians, Reconnaissance Corps, Red Cross, Royal Caterer, Royal Chandler |
| RC(Ia N) | Refugee Camp (Ile aux Noix) |
| RCA | Royal Canadian Artillery, Royal Company of Archers |
| RCA(CD) | Royal Canadian Artillery (Coast Defence Branch) |
| RCAB | Royal Canadian Artillery Band |
| RCAC | Royal Canadian Armoured Corps, Royal Canadian Army Cadets |
| RCAC(MP) | Royal Canadian Artillery Camp (Macauley Plains) |
| RCACC | Royal Canadian Army Chaplain Corps, Royal Canadian Army Cadet Corps |
| RCACD | Royal Canadian Artillery Canadian Division |
| RCACHC | Royal Canadian Army Chaplain Corps |
| RCAF | Royal Canadian Air Force |
| RCAF(Aux) | Royal Canadian Air Force (Auxiliary) |
| RCAF(PR) | Royal Canadian Air Force (Primary Reserve) |
| RCAF(R) | Royal Canadian Air Force (Regular) |
| RCAHWENDHQS | Royal Canadian Artillery, Home War Establishment, National Defence Headquarters Section |
| RCAMC | Royal Canadian Army Medical Corps |
| RCAMCPST | Royal Canadian Army Medical Corps Plastic Surgery Team |
| RCAMCTC | Royal Canadian Army Medical Corps Training Centre |
| RCAMCTC(R) | Royal Canadian Army Medical Corps Training Centre (Reserve) |
| RCanDns | Royal Canadian Dragoons |
| RCAPC | Royal Canadian Army Pay Corps |
| RCARU | Royal Canadian Artillery Reinforcement Unit |
| RCASC | Royal Canadian Army Service Corps |
| RCASCB | Royal Canadian Army Service Corps Band |
| RCASC-CASF | Royal Canadian Army Service Corps - Canadian Active Service Force |
| RCASCCF | Royal Canadian Army Service Corps Company Force |
| RCASCG | Royal Canadian Army Service Corps Group |
| RCASCHU | Royal Canadian Army Service Corps Holding Unit |
| RCASCRU | Royal Canadian Army Service Corps Reinforcement Unit |
| RCASCTC | Royal Canadian Army Service Corps Training Centre |
| RCASCTCR | Royal Canadian Army Service Corps Training Centre Reserve |
| RCATC | Royal Canadian Artillery Training Centre |
| RCATC(R) | Royal Canadian Artillery Training Centre Reserve |
| RCC | Railway Construction Company, Remote Control Officer |
| RCCRCE | Road Construction Company, Royal Canadian Engineers |
| RCCS | Royal Canadian Corps of Signals |
| RCCSTC(R) | Royal Canadian Corps of Signals Training Centre (Reserve) |
| RCD | Royal Canadian Dragoons |
| RCDC | Royal Canadian Dental Corps |
| RCE | Royal Canadian Engineers, Railway Construction Engineer |
| RCE(NP) | Royal Canadian Engineers (Non-Permanent Active Militia) |
| RCEB | Royal Canadian Engineers Bands |
| RCECO | Royal Canadian Engineers Corps Orders |
| RCEDF | Royal Canadian Detachment Force |
| RCEME | Royal Canadian Electrical and Mechanical Engineers |
| RCESA by HQ | Royal Canadian Engineers Section Administered by Headquarters |
| RCETC | Royal Canadian Engineers Training Centre |
| RCETC(R) | Royal Canadian Engineers Training Centre (Reserve) |
| RCEWDCMHQ | Royal Canadian Engineers Works Directorate, Canadian Military Headquarters |
| RCFA | Royal Canadian Field Artillery |
| RCFC | Refreshers Course for Officers |
| RCFQ | Refugee Camp Farnham Quebec |
| RCGA | Royal Canadian Garrison Artillery |
| RCHA | Royal Canadian Horse Artillery |
| RCHQ | Rear Canadian Headquarters |
| RCIC | Royal Canadian Infantry Corps |
| RCL | Royal Canadian Legion |
| RCM | Military Sub-Committee Of the Ministerial Committee on Reconstruction Problems |
| RCMDS | Remote Control Mine Disposal System |
| RCMP | Royal Canadian Mounted Police |
| RCN | Royal Canadian Navy |
| RCN(R) | Royal Canadian Navy (Reserve) |
| RCNAS | Royal Canadian Naval Air Service |
| RCNB | Royal Canadian Naval Barracks |
| RCNH | Royal Canadian Naval Hospital |
| RCNMR | Royal Canadian Naval Monthly Reserve |
| RCNR | Royal Canadian Naval Reserve |
| RCNR(FR) | Royal Canadian Naval Reserve (Fisherman's Reserve) |
| RCNVR | Royal Canadian Naval Volunteer Reserve |
| RCO | Railway Control Officer |
| RCOC | Royal Canadian Ordnance Corps |
| RCOCAM | Royal Canadian Ordnance Corps Army Magazine |
| RCOCB | Royal Canadian Ordnance Corps Band |
| RCOCCO | Royal Canadian Ordnance Corps Orders |
| RCOCHU | Royal Canadian Ordnance Corps Holding Unit |
| RCOCMG(MD)P | Royal Canadian Ordnance Corps Magazine Guard (McGivney Depot) Petawawa |
| RCOCTC(R) | Royal Canadian Ordnance Corps Training Centre (Reserve) |
| RCPC | Royal Canadian Postal Corps |
| RCR | Royal Canadian Regiment |
| RCRR | Royal Canadian Rifle Regiment |
| RCS | Royal Canadian Signals, Royal Corps of Signals, Routing and Convoy Section, Radar and Communication School |
| RCS ENG, RCSE | Royal Canadian Signal Engineers |
| RCSB | Royal Canadian Signals Band |
| RCSC | Royal Canadian Sea Cadets |
| RCSIGS, RCS | Royal Canadian Corps of Signals |
| RCSME | Royal Canadian School of Military Engineering |
| RCSTC | Royal Canadian Signals Training Centre |
| RCT | Royal Corps of Transport |
| RD | Refer to Drawer, Reception (or Release, Repair, Repatriation) Depot, Road, Round, Royal Dragoons |
| RD FUS, RDF | Royal Dublin Fusiliers |
| RDBW | Regimental Depot The Black Watch (Royal Highland Regiment) of Canada |
| RDC | Royal Defence Corps |
| RdConstCoy | Road Construction Company |
| RdeChat | Regiment de Chateauguay |
| RdeChaud | Regiment de Chaudiere |
| RdeH | Regiment de Hull |
| RdeJol | Regiment de Joliette |
| RdeMais | Regiment de Maisonneuve |
| RdeMont | Regiment de Montmagny |
| RdeStHya | Regiment de St Hyacinthe |
| RDF | Radio Direction Finder (Radar) |
| RDF | Radio Direction Finding |
| RDFMU | Radio Direction Finder Maintenance Units |
| RDFO | Radio Direction Finder Officer (Naval) |
| RDFOU | Radio Direction Finder Operating Unit |
| RDFS | Radio Direction Finder School |
| RDG | Royal Dragoon Guards |
| RDIRCASC | Relief Driver Increment, Royal Canadian Army Service Corps |
| RDLI | Royal Durban Light Infantry |
| RDMHRCAMC | Red Deer Military Hospital, Royal Canadian Army Medical Corps |
| RDOVI | Reinforcing Draft Overseas, 14th Reinforcement Draft Overseas |
| RdrPC(A) | Radar Performance Checker (Air) |
| RdrPC(G) | Radar Performance Checker (Ground) |
| RdrPltr | Radar Plotter (Sea) |
| RdrTec(A) | Radar Technician (Air) |
| RdrTec(G) | Radar Technician (Ground) |
| RdrTech | Radar Technician |
| RduSag | Regiment du Saguenay |
| RDY | Royal 1st Devon Yeomanry |
| RE | Royal Engineers, Corps of Royal Engineers, Research Establishment |
| RE(CW) | Research Establishment (Chemical Warfare) |
| REA | Real Estate Advisor |
| REAR ADMIRAL, RKMS | Rear Admiral (Indian Army) |
| REC | Recovery |
| RECCE | Reconnaissance Corps, Reconnaissance, Reconnaître |
| Recom | Decommissioned |
| Recruits | Naval Recruiting Office (Permanent Naval Force) |
| REDDERSBG CDO | Reddersburg Commando |
| REF | Radio Experimental Flight |
| REF ENG | Refrigeration Engineer |
| REFG GR | Refrigeration Greaser |
| RefTech | Refinisher Technician |
| REG | Regular, Regulating, Regulation(s) |
| Regt, Reg, Rgt, Regtl | Regiment |
| Rehab | Rehabilitation |
| RE-HC | Re-Habilitation Course |
| reinf | Reinforcement(s) |
| REKENTMR, REKMR | Royal East Kent Mounted Rifles |
| rem | Remained |
| REME | Corps of Royal Electrical and Mechanical Engineers |
| REMS | Reserve Equipment Maintenance Satellites |
| REMT DEPT | Remount Department |
| REMU | Reserve Equipment Maintenance Units |
| Rep | Repatriated, Representative |
| Rep Bn | Replacement Battalion |
| RepatDep | Repatriation Depot |
| REPS | Royal Engineers Postal Section |
| REPT | reported, Reserve Entry Training Program |
| Rep't, Reptd, Rept't | reported |
| RERMC | Riding Establishment Royal Military College |
| Res | Reserve |
| RES WD MTE | Reserve Wardmaster's Mate |
| RESO | Reserve Entry Scheme - Officers |
| RESVT | Reservist |
| RETD | Retired, Returned |
| RETP | Reserve Entry Training Plan |
| REV | Revolutionary, Reverend |
| RF | Reserve Fleet |
| RF | Royal Fusiliers (City of London Regiment), Reserve Fleet |
| RFA | Royal Field Artillery, Royal Fleet Auxiliary |
| RFB | Reported from Base, Regimental Funds Board |
| RFC | Royal Flying Corps, Reserve Force Centre |
| RFCNW | Royal Flying Corps Naval Wing |
| RFN, RFLM, RFMN, RFRN | Rifleman |
| RforCMF | Reinforcements for Central Mediterranean Force |
| RFR | Royal Fleet Reserve |
| RFRA | Royal Artillery Pre-War Reservist |
| RFT(S) | Reinforcement(s) |
| RFTP | Refresher Flying Training Plan |
| RG | Regulating Petty Officer |
| RGA | Royal Garrison Artillery |
| RGBW | Royal Gloucestershire, Berkshire and Wiltshire Regiment |
| RGH | Royal Gloucestershire Hussars |
| RGJ | Royal Green Jackets |
| RGR | Royal Garrison Regiment, Royal Gurkha Rifles/Regt (the 5th Gurkhas) |
| RGSS | Registrar General of Shipping and Seamen |
| RGT, REGT | Regiment |
| RH | Railhead |
| RH | Royal Hussars (Prince Albert's Own), Railhead |
| RH &FA | Royal Horse and Field Artillery |
| RHA | Royal Horse Artillery |
| RHA | Royal Horse Artillery, Royal Hibernian Academy, Reserve Heavy Artillery |
| RHACR | Rhodesian Armoured Car Regiment |
| RHAMPS | Royal Hampshire Regiment |
| RHC(ofCan) | Black Watch (Royal Highland Regiment) of Canada, Royal Household Cavalry |
| RHF | Royal Highland Fusiliers |
| RHG/D | Royal Horse Guards and Royals Dragoons, (Blues and Royals) |
| RHIGHRS | Royal Highlanders (The Black Watch) |
| RHKR(V) | Royal Hong Kong Regiment (Volunteers) |
| RHLI | Royal Hamilton Light Infantry |
| RHN | Royal Hellenic Navy |
| RHOD | Rhodesia |
| RHOD VF | Rhodesian Volunteer Forces |
| RHODESIA NREGT | Rhodesia Native Regiment |
| RHODESIA R, RHODESIA REGT, RHODN REGT | Rhodesia Regiment |
| RHODESIAN FF | Rhodesian Field Force |
| RHODESIAN H | Rhodesian Horse |
| RHODNS SAI BGDE | Rhodesian South African Infantry Brigade |
| RHofCAN, RHC, RHRofC | Royal Highlanders of Canada |
| RHQ | Regimental Headquarters |
| RHQRCASC | Reconstituted Headquarters, Royal Canadian Army Service Corps |
| RHR | Royal Highland(ers) Regiment |
| RHSAS | Rhodesian Special Air Service |
| RHU | Reserve Holding Unit |
| RIA | Royal Indian Artillery |
| RIAF | Royal Indian Air Force |
| RIAMC | Royal Indian Army Medical Corps |
| RIF | Royal Inniskilling Fusiliers, Royal Irish Fusiliers (Princess Victoria's), Rifles, Rifleman |
| RIF BRIG, RIFBRIG | Rifle Brigade (Prince Consort's Own) |
| RIFLES | Rifles |
| RIIP | Reserve Integrated Information Project |
| RIM(S) | Royal Indian Marine (Service) |
| RIN | Royal Indian Navy |
| RIP | Requiescat in peace (May he rest in peace) |
| RIR | Royal Irish Rifles, Royal Irish Regiment |
| RIRF, RIsFus | Royal Irish Fusiliers |
| RIRRGRS | Royal Irish Rangers |
| RKMS | Regimental Quarter Master Sergeant |
| RLE | Radio Location Establishment |
| RLHQ | Rear Link Headquarters |
| RLI | Rand Light Infantry, Rhodesian Light Infantry |
| RLL(UK) | Rotation Leave List (United Kingdom) |
| RLMSRCCS | Railway Line Maintenance Section, Royal Canadian Corps of Signals |
| RLO | Research Liaison Officer (Naval) |
| RLRCAMC | Research Laboratory, Royal Canadian Army Medical Corps |
| RLU | Radio Location Unit |
| RlwyConst(Op)(Tg)Coy(Gp) | Railway Construction (Operating) (Telegraph) Company (Group) |
| RLY BN EA | Railway Battalion Egyptian Army |
| RLY CC | Railway Construction Company |
| RLY DF | Railway Defence Force |
| RLY PNR REGT | Railway Pioneer Regiment |
| RLY REGT | Railway Regiment |
| Rly, Rlwy | railway |
| RM | Royal Marines, Riding Master, Radio Mechanic (Air), Radioman |
| RM & LIEUT | Riding Master and Lieutenant |
| RM BDE, RM BRIG | Royal Marine Brigade |
| RM BDE, RM BRIG | Royal Marine Brigade |
| RMA | Royal Marine Artillery, Royal Military Academy, Royal Malta Artillery, Rear Maintenance Area |
| RMAS | Royal Military Academy Sandhurst |
| RMB | Royal Marine Band |
| RMBPD | Royal Marine Boom Patrol Detachment |
| RMC | Royal Military College (of Canada) |
| RME | Royal Marine Engineers |
| RMF | Royal Munster Fusiliers |
| RMFA | Royal Malta Fencible Artillery, Royal Marine Field Artillery |
| RMFA | Royal Marine Field Artillery |
| RMG | Royal Munster Fusiliers |
| RMHRCAMC | Rideau (or Rimouski) Military Hospital, Royal Canadian Army Medical Corps |
| RMi | Riegelmine |
| RMLC | Royal Marine Labour Corps |
| RMLI | Royal Marine Light Infantry |
| RMLY | Royal Mercian and Lancastrian Yeomanry |
| RMO | Regimental Medical Officer, Royal Marine Office, Reserve of Medical Officers |
| RMONRE | Royal Monmouthshire Royal Engineers |
| RMontR, RMR | Royal Montreal Regiment |
| RMP | Royal Military Police, Rocky Mountain Rangers |
| RMSCR | Royal Marine Support Craft Regiment |
| RMSF | Royal Marine Striking Force |
| RMSM | Royal Marine Submarine Miners |
| RMSO | Royal Marine Signal Office |
| RMT DEPT | Remount Department |
| RMTC | Radio Mechanic's Training Centre |
| RMTCRCASC | Reserve Mechanical Transport Company, Royal Canadian Army Service Corps |
| RMTech | Refrigeration and Mechanical Technician |
| RMTG | Royal Marine Training Group |
| RN | Royal Navy |
| RN(V)R | Royal Naval (Volunteer) Reserve |
| RNA | Royal Naval Academy |
| RNACD | Royal Naval Armoured Car Division |
| RNAD | Royal Navy Armament Depot |
| RNARY | Royal Naval Aircraft Repair Yard |
| RNAS | Royal Naval Air Service |
| RNASAAC | Royal Naval Air Service Anti-Aircraft Corps |
| RNASBR | Royal Naval Auxiliary Sick Berth Reserve |
| RNAV | Royal Naval Artillery Volunteers |
| RNAWR | Royal Naval Auxiliary Wireless Reserve |
| RNB | Royal Naval Barracks |
| RNBTR | Royal Naval Benevolent Trust Representative |
| RNC | Royal Naval College |
| RNCV | Royal Naval Coast Volunteers |
| RNCVR | Royal Navy Canadian Volunteer Reserve |
| RND | Royal Naval Division |
| RND ENG | Royal Naval Division Engineers |
| RNDEVONY, RNDY | Royal North Devon Yeomanry (Hussars) |
| RNDevonYeo | Royal North Devon Yeomanry |
| RNDVR | Royal Navy Canadian Volunteer Reserve |
| RNF | Royal Northumberland Fusiliers |
| RNLO | Royal Naval Liaison Officer |
| RNMBRRNMWS | Royal Naval Motor Boat Reserve |
| RNMWS | Royal Navy Mine Watching Service |
| RNN | Royal Netherlands Navy |
| RNO | Resident Naval Officer (or Overseer) |
| RNorN | Royal Norwegian Navy |
| RNPS | Royal Naval Patrol Service |
| RNR | Royal Naval Reserve, Royal Newfoundland Regiment, Royal Norfolk Regiment |
| RNR(T) | Royal Naval Reserve Trawler Section |
| RNS | Radio and Navigation School |
| RNSC | Royal Navy Staff College |
| RNSR | Royal Naval Special Reserve |
| RNSWR | Royal New South Wales Regiment |
| RNTE | Royal Naval Training Establishment |
| RNTF | Royal Naval Torpedo Factory |
| RNTS | Royal Naval Transport Service |
| RNV(S)R | Royal Naval Volunteer Supplementary Reserve |
| RNV(W)R | Royal Naval Volunteer Wireless Reserve |
| RNVR | Royal Naval Volunteer Reserve |
| RNVRAAC | Royal Naval Volunteer Reserve Anti-Aircraft Corps |
| RNVRPS | Royal Naval Volunteer Reserve Pigeon Service |
| RNWAR | Royal Naval Wireless Auxiliary Reserve |
| RNWCC | Royal Naval War Comforts Committee |
| RNWL | Royal Naval War Libraries |
| RNWMP | Royal Northwest Mounted Police |
| RNXS | Royal Naval Auxiliary Service |
| RNZA | Royal New Zealand Artillery |
| RNZAF | Royal New Zealand Air Force |
| RNZE | Royal New Zealand Engineers |
| RNZIR | Royal New Zealand Infantry Regiment |
| RNZN | Royal New Zealand Navy |
| RO | Roll On, Roll Off |
| RO | Routine Order, Reserve of Officers, Roll On, Roll Off, Records Only, Recruiting (or Report, Reporting, Reinforcement, Retired) Officer, Recruiting Office |
| ROBERT'S H | Robert's Horse |
| ROC | Royal Observer Corps |
| ROCA | Resident Officer Canal Area |
| ROCMHQ | Records Office, Canadian Military Headquarters |
| ROD | Railway Operating Division |
| ROE | Rules of Engagement |
| RofP | Report of Proceedings |
| ROGRCE | Railway Operating Group, Royal Canadian Engineers |
| ROLSH(RC)CA(AF) | Regimental Orders Lord Stratchcona Horse (Royal Canadians) Canadian Army Active Force |
| RomRsch | Communicator Research |
| RONDEBOSCH DRA | Rondebosch Defence Rifle Association |
| ROO | Railway Ordnance Officer |
| ROp | Radio Operator |
| ROSJD | Routine Orders St John's Defences |
| ROSS BY ART | Ross Battery Artillery |
| ROSS'S SCTS | Ross's Scouts |
| ROTC | Reserve Officer's Training Corps, Regular Officers Training Corps |
| ROTP | Regular Officer Training Plan |
| ROTP(CMC) | Regular Officer Training Plan (at Canadian Military Colleges) |
| ROTP(U) | Regular Officer Training Plan (at Civilian Universities) |
| RO''W''F | Routine Orders ''W'' Force |
| RO''Z''F | Routine Orders ''Z'' Force |
| RP | Regimental Police, Rules of Procedure, Refilling Point, Reporting Point, Radar Plot Rate, Reserve Posting, Radar Plotter |
| RP (Records) | Reserve Posting (Records) |
| RPC, RPR | Royal Pioneer Corps |
| RPIGHQ&LofCT | Rear Party Increment General Headquarters & Line of Communication Troops |
| RPO | Regulating Petty Officer |
| RPSD | Reserve Pacific Support Depot |
| RPV | Remotely Piloted Vehicle |
| RQ&A | Rations, Quarters and Allowance |
| RQM | Regimental Quartermaster |
| RQMS | Regimental Quartermaster Sergeant |
| RQR | Royal Queensland Regiment |
| RR | Railroad, Rifle Range, Radiographer |
| RR of C, RRegC, RRC | Royal Regiment of Canada |
| RR of CAV | Reserve Regiment of Cavalry |
| RR, R/R | Railroad |
| RRA | Royal Regiment of Artillery |
| RRC | Royal Regiment of Canada, Royal Rifles of Canada, Royal Red Cross |
| RRE | District Recruiting Establishment |
| RRF | Royal Regiment of Fusiliers |
| RRFA | Royal Regiment of Field Artillery |
| RRGA | Royal Regiment of Garrison Artillery |
| RRMC | Royal Roads Military College |
| RRR | Regina Rifle Regiment, Royal Rhodesia Regiment |
| RRR | Royal Rhodesia Regiment |
| RRW | Royal Regiment of Wales |
| RS | Royal Scots (Lothian Regiment), (Royal Regiment), Recruiting (or Regulating) Station, Reserve Status, Reinforcement Section |
| RS FUS, RScFus, RSF | Royal Scots Fusiliers |
| RSA | Royal School of Artillery |
| RSAR | Royal South Australia Regiment |
| RSCFC | Reinforcement Section Canadian Forestry Corps |
| RSCOTS | Royal Scots (Lothiam Regiment) |
| RSD | Railway Supply Detachment |
| RSDG | Royal Scots Dragoon Guards |
| RSHQCFC | Reinforcemetn Section Headquarters Canadian Forestry Corps |
| RSM | Royal School of Musketry |
| RSM, RS MJR | Regimental Sergeant Major |
| RSME | Royal School of Military Engineering |
| RSMHRCAMC | Rectory Street Military Hospital, Royal Canadian Army Medical Corps |
| RSO | Range Safety Officer, Railhead Supply Officer |
| RSP | Road Staging Post |
| RSR | Royal Sussex Regiment, Raiding Support |
| RSS | Regular (or Regimental) Support Staff, Royal School of Signals |
| RSTech | Radar Systems Technician, Radioman Special Technician |
| RSU | Repair and Salvage Unit |
| RSussR, R SUSS, RSR, RSX | Royal Sussex Regiment |
| RT | Radio Telephony, Radio Technician |
| RT REV LORD BISHOP | Right Reverend Lord Bishop |
| RTC | Reserve Training Centre, Royal Tank Corps, Returned to Corps |
| RTCRCAR | Reserve Training Centre, Royal Canadian Artillery Reinforcements |
| RTE | Railway Transport Establishment |
| RTM | Ready to Move |
| Rtn | Return |
| Rtns | Rations |
| RTO | Regimental (or Railway) Transport Officer, Research Technical Officer, Return to Owners |
| RTO | Return to Owners |
| RTOSRCCS | Railway Telegraph Operating Section, Royal Canadian Corps of Signals |
| RTR | Royal Tank Regiment, Royal Tasmania Regiment |
| RTTP | Reserve Tradesmen Training Plan |
| RTU | Returned to Unit |
| RU | Reinforcement Unit, Radio Unit |
| RU RIF, RUR | Royal Ulster Rifles |
| RUNDLES SCTS | Rundle's Scouts |
| RUSTENBG CDO | Rustenburg Commando |
| RV | Rendezvous point on Patrol |
| RV(S) | Rifle Volunteers |
| RVB | Royal Veteran Battalion(s) |
| RVC | Rifle Volunteer Corps |
| RVHM | Royal Victoria Hospital Montreal |
| RVM | Royal Victorian Medal |
| RVR | Royal Victoria Regiment |
| RW | Recorded Warning |
| RW KENT, RW KENT R | Royal West Kent Regiment |
| RWAFF | Royal West African Frontier Force |
| RWAR | Royal Western Australia Regiment |
| RWCHRCAMC | Roman Way Convalescent Hospital, Royal Canadian Army Medical Corps |
| RWCRCE | Railway Workshop Company, Royal Canadian Engineers |
| RWF, RWFUS | Royal Welsh Fusiliers (redesignated 1921 "Welch") |
| RWING | Reinforcement Wing |
| RWpgR, RWR | Royal Winnipeg Rifles |
| RWPU | Radio Wave Propagation Unit |
| RWR | Royal Warwickshire Regiment, Royal Winnipeg Rifles |
| RWXY | Royal Wessex Yeomanry |
| RX | Army Remount Section, Army Service Corps Number Prefix |
| Ry | Railway |
| RY BN S & M | Railway Battalion Sappers & Miners |
| RYM | Royal Yugoslav |
| RYPA | Roll, Yaw, Pitch and Alter Course |
| RYR | Royal Yeomanry Regiment |
| RYS | Royal Yacht Squadron |