Units
Two main units involved were Army Service Corps (British) and South African Service Corps (SASC) [scroll down for SASC].
They included:
Transport and Remounts
For info on Conductors: https://www.rlc-conductor.info/
Mechanised
Supply
The following served in East Africa according to War Office files:
WO 33/893 –
MT 599 Base Mechanical Transport Depot and Repair unit EA
MT 618 No 18 Motor Ambulance Convoy EA
MT 635 Supply Column, Kilwa EA
MT 648 84th Auxiliary (MT) Company (for Maintenance Services) EA
MT 699 No 29 Motor Ambulance Convoy EA
MT 816 Supply Column EA
MT 817 Supply Column EA
Field Bakery 72 EA (War Establishment Part VII 1915)
Field Bakery 73 EA (War Establishment Part VII 1915)
Field Butchery 68 EA (War Establishment Part VII 1915)
Field Butchery 69 EA (War Establishment Part VII 1915)
WO 33/744 – to Feb 1916
224 HT 1st SA Infantry Brigade Train – Egypt
MT 570 East Africa
MT 581 West Africa
MT 599 Base Mechanical Transport Depot and Repair unit EA
MT 618 No 18 Motor Ambulance Convoy EA
MT 622 with Naval Kite Balloon Section EA
MT 632 with RMA Brigade EA
MT 634 Divisional Ammunition Column EA
MT 635 Brigade Supply Column EA
Depot units of supply – 378, 379, 380, 381, 382, 383, 384, 385, 386, 387 EA
Field Bakeries – 72, 73 EA
Field Butcheries – 68, 69 EA
WO 162/6 (Directorate of organisation 1914-1918) has the following references which might be of use.
f17 – Lt Gen Sir HM Lawson tour of theatres in early 1917 to ascertain economies of manpower – reports to WO [where EA? – does not look like he got there. See ff96, 97]
ff168-171 – AG2 sends drafts to EA
f492 – EA lines of comms
See also f495 signals not EA
ff508-512 post in EA etc
f526 printing, 527 topographical
South African Service Corps (SASC)
SA Army Corps (SANDF Doc Centre: AG 1914-1921 152) focuses on when the unit was set up in the Permanent Force which was 1923. Before that, it says: ’Prior to the passing of the Defence Act 1912, South African Service Corps units were not in existence.
From the 1st July 1913 to the outbreak of the Great War, 15 Brigade Trains, the personnel of which was drawn from the Active Citizens Force, were in process of organisation. During that period there was a small Permanent Staff responsible for the provision of supplies at Citizen Force Camps.
The outbreak of the Great War brought about rapid expansion and temporary Supply and Transport units were organised for operations in the German South West Africa and East Africa campaigns.
In 1923 the SA Permanent Force was re-organised and the SA Service Corps came into existence.’