Good question! Isn’t there a stereotype of CIA agents funding coups in various countries, to install US puppet regimes? Insofar as this is a correct description of what’s been happening, it seems like a modern example of what I’m talking about. A small number of people with an intel and tech advantage over the locals, promising to represent a faraway greater power, engages in some intrigue and allies with some local factions and somehow ends up on top. Admittedly, this isn’t as clear of an example as it could be.
I think part of the issue is that these days there just aren’t that many isolated military conflicts. Most military conflicts these days are but minor theatres of a much bigger cold war between great powers. (This is perhaps my take on your #1 and #5)