About your "border skirmishes" and "possibility of a ground intervention": I never spoke about that. When there already was a Saudi-led invasion taking place, you could not argue the way you are doing anyway. I even did not speak about "Yemeni Fighters Trained in Persian Gulf" or something like that. I'm generally talking about the whole Saudi-led intervention (or: "intervention phase of the 2015 Yemeni conflict") in historic sense with all its features.
Yes "slowly" I got it, that you just don't use the meaning of the term "military intervention" correctly. This term doesn't mean just the operations performed by one side (maybe you are changing Wikipedia encyclopedia with a military gazette?), but it addresses to a form of international conflict. Military intervention is "Interference by a state in another’s affairs" by military means. That means that both - the operations of the intervening powers and the domestic operations are intermingled. Anyway there are domestic reactions to the intervention. And you'll find no historic literature, that tries to separate them, because exactly this is the character of an intervention. Every singly source dealing with the military intervention in Yemen 2015 deals with both, the foreign intervention operation and the existing ground fightings of the domestic conflict. Still you did not provide a single source that claims, they do not belong together. It is your"" to treat them as separate topics and historic events. Greetings,