Good point — we need to deal with the drones.
I’ll post my earlier suggestions [refined a little] to ‘all’.
Airborn loses its mobility the second they jump from the plane.
They are lightly armed, low on supplies.
We need to confront them close to the border. Better logistics and support.
Call it a ‘disaster area’ or zone under martial law. Or take northern part of Mexico if laws get in way within our borders.
We need earthworks ASAP. We need to jam drone signals to blind their drone scouts. I would prefer a no-fly-zone as well and we should keep satellite feeds close to the vest in that area. Naval perimeter at adjacent coastlines. Armored river craft patroling the Rio Grande.
Skunk water repellant. Flash bang grenades dropped to simulate bombs. Recordings of combat sounds to spread panic. A daisy cutter above the water to look like a mushroom cloud — easily mistaken for a nuke.
Rubber bullets, foam bullets, and sealed cases of conventional ammo which sergeants can quickly open if permitted.
Leaflet drops.
Loudspeaker warnings.
And a literal wall of fire.