Biden Orders 1,500 Soldiers to Southern Border ahead of Title 42 Expiration
Soldiers are solely tasked with administrative/support roles and will not be armed, so your fantasy about automatic rifles is terribly mis-informed. We've seen this before, although I see you don't remember it.
Weapons aren't needed to do laundry, change diapers, drop off iPhone chargers, cook, do dishes, mop, clean bathrooms or file forms.