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I am afraid this is largely a wargamer myth. The kind of forces you are thinking about disappeared 100 to 200 years before this time. The Austrian Grenzers were modelled on the Provincial infantry I mentioned, who indeed were also often Balkans infantry. The Austrian hussars were modelled on the Moldavian/Wallachian cavalry I mentioned who were also Balkans troops. The Ottoman provincials fought in 'line' in battles rather than being skirmishers like grenzers of the earlier 18th century. Both these Ottoman types could be called 'irregular' but that depends on what exactly you mean by this. They were generally paid professional soldiers but didn't fight in the 'regular' way Europeans thought of it, but then neither did the rest of the army.I have no doubt various other types would feature in small scale actions in the 'little war' - on both sides. Peasants armed with improvised weapons, hastily raised militia, poorly armed garrison types, etc. But all these were not part of either sides normal troops used in the actual army at this time.
There's some cold water on my face. I must admit this period is one where my knowledge is mostly from wargame publications. I should be wary of wargamer history since periods that I do know more about point up the loose nature of such game "history".