So I need some sort of early Victorian military structure, presumably covering ground forces (gunners, skirmishers, dragons running the defences, etc.) as well as air cavalry (dragons, possibly carrying rifles but mostly relying on their natural weaponry). The feeling I get is "North-West Frontier," e.g. British army in India, but probably a bit more mobile, combined with a bit of a feel of early Royal Flying Corps. For some reason the US Cavalry near Indian territory comes to mind, e.g. the bit where they're mobile, operating out of frontier forts, but I don't really know an awful lot about them.
Anyone want to suggest a table of organization?