Of course my reference to these colonial troops pressganged into the British army as 'mercenaries', and to Egypt as if it were the sovereign country it nominally was at the time, are less than entirely serious.
Australia and New Zealand were having their own joint corps at the time of this battle.
Actually, the British Army had a corps consisting of Australian and Kiwi soldiers and lesser-to-middling officers. Australia also had an "army" - really more of a mounted police-cum-army reserve corps - but that (as an organization, not many of its individual members and indeed units) didn't serve in the Middle East.
Though Australia and New Zealand were technically asked about the decision to raise it (which Australian and NZ public opinion demanded at the time, anyways. Just as everywhere in Europe. A huge minority even of Australia's young men, and a much larger of its decision makers, being first-generation immigrants after all.)