[@Willy Vereb]

The most recent armed conflict involving tanks and such absolutely decimating traditional armies would probably be Tin's occupation of the Zanjir. As will be elaborated in the IC, the natives resisted the (supposedly) friendly missionaries and colonists, and stole some civilian-class firearms. The Sultan then proceeded to send in tanks and soldiers equipped with flamethrowers and military-grade weaponry, so it was an absolute massacre. That would have been a few years ago, currently Tin has only fully gained control of a few large islands and there are several more that they claim but have yet to actually subjugate and colonize.

Keep in mind that Tin is trying to keep as much information about this as possible from reaching the ears of foreign countries, both because they don't want others to realize how many resources the islands have and rush to colonize, and because Tin has been doing some pretty egregious violations of human rights. Of course, since Yllendthyr seems to be interested in the islands as well, it's reasonable to say that they somehow found out about these events.