Didn't the Greeks conduct maritime guerrilla ops in the Mediterranean during WW II? And waterborne operations have been part of unconventional warfare and direct action doctrine since WW II.

Note also that one of Castro's and Guevaro's instructors (Alberto Bayo) was a pilot and recommended the use of aircraft by guerrillas. Not clear where it falls in the Venn diagram, but the drug traffickers/guerrillas in S. America have some airframes, don't they?

I think it is useful to consider the commonalities and differences between insurgency, guerrilla warfare, and civil war/revolution, but the land warfare bubble is distracting and confusing. Now to talk about these forms of small wars, we should probably agree on definitions first, but that might exceed the thread's load capacity. I agree with Steve that "guerrilla" is methodology, and "Insurgency" or "revolution" is a strategic aim. "Civil war" is a description, and one of questionable utility when you consider that very few, if any "civil wars" were purely internal to a nation, without some other power aiding and abetting one or both sides. The term creates a bias to avoid considering influences and interests outside the borders of the nation with the problem.