Yes! I think that you were right:
The occupation of Merga and Oweinat
by the Sudan Defence Force, 1934
Unpublished SDF Operations Diary &
photographs by F.G.B. Arkwright
Source:
http://www.fjexpeditions.com/frameset/plans.htm
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Can somebody tell me the precise type of the truck?
(Copied photos removed since I recognized that the owner of the said site wishes not to copy them. Please jump to his site to see them. Thanks)