Yep.
I said it earlier this week: no one's thought that far ahead, that these people are going to be placed into literal concentration camps.
It's like the organizers are specifically trying to trigger a civil war.
I think it's hard to argue as a matter of international law that broadcasting noise across the border is an act of war.
I mean, someone would argue it, I'm sure, probably on some crackpot belief that the military is using "assault speakers" that are qualitatively different from my Yamaha floor speakers or something. And I can't wait to laugh at them.
I have to add, too, that we have no idea what's going on diplomatically between Mexico and the US. It's possible (albeit highly unlikely, as it would end Nieto's government) that the US and Mexico have an agreement that once the caravan hits the border, the US military can enter Mexico strictly to control the crowd and enforce an orderly crossing of the border, so that CBP can process the asylum requests.
(And aside from the Mexican people rioting in the streets over a US invasion, it's a sound plan: Keeps the refugees safe, eliminates any argument that the Army is being used to enforce domestic law, properly enforces immigration law at the border, keeps the situation from devolving into a humanitarian crisis on Mexican soil.)