How many replies before you guys get that "the world" doesn't have to be a participant in the war.
Your response makes no sense.
As for now, the Revolutionary Army is already trying to bring as many countries as possible to their sides to boost their armies even more. Bringing civilians to their side is one of their main tactics as we've seen in Lulusia Kingdom. That is a fact you cannot deny.
So yes, civilians will be included as well and they'll join the army.
The population will be sucked up into the upcoming great war and it's inevitable - yet, Vegapunk doesn't bring the facts to the table that the WG is responsible, to let the world know the current leading worldwide organisation is responsible for the current population's misery and all the natural disasters which are man-made.
It sets up the powerhouses to battle it out like you've already seen throughout this whole arc; Shanks on the move, Blackbeard on the move; Luffy vs. the Gorosei, God's Knights vs. Revs, Giants getting involved next.
You are absolutely wrong!
As I said again, the RA will be a crucial part in the alliance against the World Government. If you believe the "fodders" won't participate in that war - for whatever reasons you may believe... - there would be no point in drawing the reactions of all the fodder pirates, civilians, all the people in those islands which the strawhats even sailed before.
Also, let me get this straight: Dragon builds this massive army which consists of armies of several countries and he is using that force for the God Knights?
Not Paddy, Kaya and Gaimon coming from East Blue to fight Jay Garcia Saturn.
Nobody is stating these characters will face stronger forces of the WG but this speech is supposed to set things in motion, to "shock the world" - the incident in Egghead Island is supposed to shock the world as I said before.
So yes, it's most likely islands like Water 7, Alabasta, Dressrosa, etc. will join the armies or at least they'll be equipped to be prepared for the upcoming war because they'll know the WG is on their asses. You cannot fight an enemy unrecognisable for you.
The world understands what it needs to understand right now; Get in a boat and get to high ground. They can figure out who's the villain and who's the hero later.
There is a worldwide broadcast of the most smartest scientist in this manga and the population will only find out later that the obvious evil is responsible for all their misery - the reason why they need to get in a boat and get to higher ground, to the mountains, etc. - and then they'll keep on praying for Luffy like it's no tomorrow?
Again, another reason why the broadcast is pointless. All the higher ups are already set in motion ever since Doflamingo got defeated.
This speech isn't only important for all the big players but also for the weak and so far, this speech doesn't even explain the cause for the world sinking. Heck, the WG could EASILY draw their own narrative and point the pirates, especially the strawhats, as the devils who want to bring harm to the world. You ever thought about that?
It probably goes like this =>
It's all coming together