| Armstrong | R | | | 1st Battalion
Source: QSA and KSA medal rolls | Durham Light Infantry |
| Armstrong | R | | | Source: QSA and KSA medal rolls | 28th Battery, RFA |
| Armstrong | R | | | Died of disease. Wynberg, 13 February 1902
Civilian Vet
Source: South African Field Force Casualty Roll | Unknown |
| Armstrong | R | | | Source: WO100/252 | Imperial Military Railways |
| Armstrong | R | | Civilian Vet Surgeon | Attached
Demise: Died of disease - malignant growth, cancer, carcinoma 13 Feb 1902
Place: Cape Town. Wynberg
Source: In Memoriam by S Watt | Army Veterinary Department |
| Armstrong | R | | Civilian Engine Driver | Demise: Killed in action 19 Jun 1901
Place: Machavie Nr
Source: In Memoriam by S Watt | Imperial Military Railways |
| Armstrong | R M | 166 | Trooper | QSA (3)
Source: Provisional list of Wepener recipients | Brabant's Horse |
| Armstrong | R M | | | Source: QSA and KSA rolls | Provisional Mounted Police |
| Armstrong | R R | | | Source: QSA and KSA medal rolls | South African Constabulary |
| Armstrong | Robert | 39237 | Private | Source: QSA Medal Rolls | 134th Company, 29th Btn, IY |
| Armstrong | Robert | 9993 | Squadrom Sergeant | Source: QSA Medal Rolls | 55th Company, 5th Btn, IY |
| Armstrong | Robert | 40900 | Trooper | No known Company. Served in 35th Btn IY
Source: QSA Medal Rolls | Imperial Yeomanry |
| Armstrong | Robert | 27139 | Shoeing Smith | Source: QSA Medal Rolls | 42nd Company, 12th Btn, IY |
| Armstrong | Robert John | | Corporal | Served 29 Dec 1899 to 20 May 01. Discharged, completion of service
Source: Nominal roll in WO127 | Nesbitt's Horse |
| Armstrong | Robert Maclachlane | | | Source: Attestation paper in WO126 | Brabant's Horse |
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