They can be used as opponents for the Vietnamese/Black Flags which is what I intend to use them for, as Ged can attest. There were wars between the Siamese and Vietnamese in the 1830s .you will need the Siamese figs which Steve will have castings of in June.
The Vietnamese were allies of the Lao also, the figure that Ged has just painted is the ideal style to use. I will ask Ged if any muskets can be had.
So too answer in simple words Yes