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Certainly, John. I have used the Strelets' Regular Turkish cavalry (Code: 110 ) as Egyptian cavalry & their Bashi-Bazouks will be useful with some conversion, but the more, the merrier.
No one has offered Mahdist artillery, which might be an idea.
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My understanding is that such troops would use captured Egyptian Krupp guns, manned by captured Egyptians (in rags & chained!) under the command of a Dervish with a kurbash (hippo hide whip).